Critical Reasoning

Older cats do not always get all the vitamins they need from regular cat food. Since a lack of nutrition leads to illness and lethargy, older cats that do not receive dietary supplements are at an increased risk for many feline diseases.

Which of the following, if true, provides the most support for the argument above?

A The range of vitamins in regular cat food is smaller than the range of vitamins in specialty cat foods.

B Most cats that survive into their geriatric years have a superior inborn resistance to disease.

C Feline illnesses caused by viral transmission are far more serious than those caused by a lack of nutrition.

D Feline dietary supplements are not as effective as special diets designed to be nutritionally complete.

E Older cats that do not receive dietary supplements develop illnesses at a greater rate than those that do.


OA E

Source: Princeton Review

The stimulus says that older cats that do not receive dietary supplements are at an increased risk for many feline diseases.

Only choice E explains this - if older cats that do not receive dietary supplements develop ailments at a faster rate than those that do, the difference in the rates must be because of the dietary supplements.