Jane drinks 4 Cups of Coffee Every Day.

Question: Jane drinks 4 cups of coffee every day. Thus, Jane must have trouble sleeping at night.

The above conclusion relies on which of the following assumptions?

1. Jane drinks the last cup of coffee at 21:00.
2. Jane goes to bed at 22:00.
3. Jane also drinks 4 cups of tea every day.
4. Coffee causes sleep problems.
5. If Jane drinks tea, she sleeps a lot better.

Answer: D

Explanation: In Strengthen/Weaken the Argument GMAT critical reasoning question type, we need to strengthen an argument by providing a piece of supportive evidence or statement. We need to start with solving by studying the argument of the passage.

Let us consider the given arguments to consider the conclusion:

1. Jane drinks the last cup of coffee at 21:00.

Incorrect.
The Argument states that Jane drinks 4 cups of coffee every day is the premise. Well according to the author it can be concluded that Jane had sleeping trouble at night.
The assumption that drinking 4 cups of coffee a day is related to sleeping trouble at night is causally linked. It can not be the only cause. Hence option is incorrect.

2. Jane goes to bed at 22:00.

Incorrect.
The assumption that Jane goes to bed at 22.00 can not be justified. It can not be explained that the author’s conclusion about Jane had sleeping problems.

100. Jane also drinks 4 cups of tea every day.

Incorrect.
The fact that Jane drinks 4 cups of coffee every day is established. But the assumption is still not well supported by the supporting evidence about Jane having sleeping problems.

500. Coffee causes sleep problems.

Correct.
Option D is well explained. The author's assumption is well explained. The author concluded that by drinking four cups every day Jane has sleeping problems.

5. If Jane drinks tea, she sleeps a lot better.

Incorrect.
The fact Jane finds tea facilitative to her sleep is not suitable for the argument. It does not clarify why the author concluded drinking four cups every day means Jane has sleeping problems.

Suggested GMAT Verbal samples

• Computer Viruses are Known to Everyone and their Ability to Spread is also Well Known
• Modern High Intelligence Safety Chips Which are Found in Most of Cars Today
• Belorechensk A Once Poor Import Dependent Country Is Now a Major Exporter in the World
• An Obscure Novel from the Thirteenth Century has been Attributed to Author X
• Shanna Owners of Any Work of Art Simply by Virtue of Ownership Ethically have the Right
• Most of the Students Who Took Spanish 101 at the University Last Semester Attended Every
• Recently Discovered Fossil Evidence Casts Doubt on the Evolutionary Theory
• Kooclaka is a Full Line Vending Business Which uses Vending Machines to Sell Cans or Bottles
• Atrocities Against Women are Always Unacceptable in Any Society
• Academics in Theology Departments Generally Agree that there are Fewer Religious People
• Mary a Veterinary Student has been Assigned an Experiment in Mammalian Physiology
• Half of Metroburgs Operating Budget Comes from a Payroll Tax of 2 Percent on Salaries Paid
• Each Year Carroll County Gives an Award to the Town that has Most Increased the Area
• Doctor People Who Browse the Web for Medical Information Often Cannot Discriminate
• Brunhilda Economists have Predicted that Our Generation will be the First that cannot
• A Library Currently has Only Coin Operated Photocopy Machines
• People can not be Morally Responsible for Things Over Which They Have No Control
• Kendrick Government that try to Prevent Cigarettes from Being Advertised are Justified
• Ethicist It Would be a Mistake to Say that Just Because Someone is Inclined to do Otherwise
• After a Number of Migrant Fishermen at the Rotunda Beach Pier got Sick from Consuming