Modern Navigation Systems, Which are Found in Most of Today’s Commerce

Question: Modern navigation systems, which are found in most of today’s commercial aircraft, are made with low-power circuitry, which is more susceptible to interference than the vacuum-tube circuitry found in older planes. During landing, navigation systems receive radio signals from the airport to guide the plane to the runway. Recently, one plane with low-power circuitry veered off course during landing, its dials dimming, when a passenger turned on a laptop computer. Clearly, modern aircraft navigation systems are being put at risk by the electronic devices that passengers carry on board, such as cassette players and laptop computers.

The two portions in boldface play which of the following roles?

1. The first is a principle that the argument relies on and the second is a conclusion that can be drawn from the first.
2. The first is a fact that argument relies on and the second is a conclusion that must be drawn from this argument.
3. The first acknowledges a consideration that supports that main position; the second is that conclusion.
4. The first is an evidence that supports the conclusion, the second is that conclusion.
5. The first is a principle that is necessary for this argument, the second is a conclusion that could be drawn from this argument.

“Modern Navigation Systems, Which are Found in Most of Today’s Commerce” – is a GMAT Critical question. This particular GMAT Critical Reasoning topic has been taken from the book ‘GMAT Official Guide Verbal Review’. This weakens the argument type of the GMAT CR question. To answer the question, a candidate can either find a piece of evidence that would weaken the argument or have logical flaws in the argument. GMAT critical reasoning tests the logical and analytical skills of the candidates. This topic requires candidates to find the strengths and weaknesses of the argument, or find the logical flaw in the argument. The GMAT CR section contains 10 -13 GMAT critical reasoning questions out of 36 GMAT verbal questions.

Answer: C
Explanation: 
Since this question is based on arguments and principles, we will take the options and try to find the correct answer.
First, we will try to spot the conclusion in the argument “always”. Now, the second bold statement coincides with the conclusion or main idea of the argument. Hence, we can label it as C.

From the passage, the first bold part can be: In favor of the conclusion so that we can label it as P (a premise that supports the author's conclusion) or X (a statement that is something else: for instance an example a fact, and so on).

Now, as per the passage we have X C combination because the X indirectly supports the conclusion in this case and the second bold part is our conclusion. 

Our task now is to figure out which of the five options has this combination. 

Let us check the options one by one to find the combination:

1. In options A and E, X is not a principle. Hence, we can consider them invalid. They are suddenly out because the principle does not match.
2. For this, the first is not something the argument relies on. The reason is that the problem reason during the land is the opening of the laptop. Hence, we can also consider this. 
3. In this option, it states that the first acknowledges a consideration that supports that main position; the second is that conclusion. Hence, as per the passage and considering the option and conclusion, it seems the correct answer. Hence, we have an X-C combo.
   Though we have got the answer that we were looking for, we will still verify the last answer. 
4.  Here we have a piece of evidence or aka premise but we have an X, not a P. Also, he does not support directly the author's conclusion but indirectly. Hence, we can rule this out. 

The correct answer should be C.

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