Many Breakfast Cereals are Fortified with Vitamin Supplements.

Question: Many breakfast cereals are fortified with vitamin supplements. Some of these cereals provide 100 percent of the recommended daily requirement of vitamins. Nevertheless, a well-balanced breakfast, including a variety of foods, is a better source of those vitamins than are such fortified breakfast cereals alone.

Which of the following, if true, would most strongly support the position above?

(A) In many foods, the natural combination of vitamins with other nutrients makes those vitamins more usable by the body than are vitamins added in vitamin supplements.
(B) People who regularly eat cereals fortified with vitamin supplements sometimes neglect to eat the foods in which the vitamins occur naturally.
(C) Foods often must be fortified with vitamin supplements because naturally occurring vitamins are removed during processing.
(D) Unprocessed cereals are naturally high in several of the vitamins that are usually added to fortified breakfast cereals.
(E) Cereals containing vitamin supplements are no harder to digest than similar cereals without added vitamins.

Answer: A
Explanation:

This is a GMAT critical reasoning question. An assumption is an implied hypothesis. So we are looking for something that is implied in the argument. In case it is wrong or maybe disable the argument.
We need to find the option that supports the passage. We will extract the premise, the conclusion and the pre-thinking from the passage first.

Premise : - Many breakfast cereals are fortified with vitamin supplements. Some of these cereals provide 100 percent of the recommended daily requirement of vitamins.

Conclusion : - Nevertheless, a well-balanced breakfast, including a variety of foods, is a better source of those vitamins than are such fortified breakfast cereals alone.

Prethinking : - Anything that suggests "well balanced diet" or WBD is better than Fortified cereals or FC alone. In other words we need to find a statement that says WBD is better than FC.
Now, we will check the options one by one to see which one supports the pre-thinking.

(A) In many foods, the natural combination of vitamins with other nutrients makes those vitamins more usable by the body than are vitamins added in vitamin supplements. - This statement perfectly says why "WBD" is better than "FC". Since this statement matches exactly with the pre thinking, this is the correct choice.

(B) People who regularly eat cereals fortified with vitamin supplements sometimes neglect to eat the foods in which the vitamins occur naturally.
This statement does not matter. The reason is people neglecting to eat naturally occurring fooddoes not state that WBD is better tha FC. hence, this is not correct.

(C) Foods often must be fortified with vitamin supplements because naturally occurring vitamins are removed during processing.
This option is talking about FC. It describes how naturally occurring vitamins are removed during processing. This doesn't tell us which one is better, WBD or FC.

(D) Unprocessed cereals are naturally high in several of the vitamins that are usually added to fortified breakfast cereals.
This option is not related or does not compare WBD with FC. It talks about fortified breakfast cereals where unprocessed cereals are added. These cereals are high in vitamins. Hence, this is also not correct.

(E) Cereals containing vitamin supplements are no harder to digest than similar cereals without added vitamins.
In this option, the prompt or author is not bothered about the digestion of WBD and FC. Hence, this is also not the correct option.

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