Decreases in the levels of triglycerides in the human bloodstream

Question

Decreases in the levels of triglycerides in the human bloodstream lower the occurrence and severity of fatty deposits on artery walls. Levels of triglycerides in the bloodstream of some people are significantly reduced by a regimen of regular exercise and a diet low in fat.

Which of the following can be correctly inferred from the statements above?

A. Individuals who eat no dietary fat do not run any risk of developing fatty deposits on their artery walls. 
 B. Individuals who do not exercise regularly have a high risk of developing fatty deposits on their artery walls late in life. 
 C. Exercise and restricted consumption of dietary fat are the best methods for lessening the severity of arterial fat deposits. 
 D. A program of regular exercise and consumption of low levels of dietary fat reduces arterial fat deposits in some individuals. 
 E. Only regular exercise is needed to reduce arterial fat deposits in individuals who consume average levels of dietary fat.

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Krunaal · Answer

A.  Not necessarily true.  The statement does not rule out the possibility that other factors can contribute to fatty deposits.

B.  Not supported.  While regular exercise is beneficial, the statements do not provide enough evidence to claim that those who do not exercise have a high risk.

C.  Not supported.  The original statements do not claim these methods are the best; they only indicate that they can reduce triglyceride levels in some individuals.

D.  Correct inference.  This statement directly follows from the provided information that regular exercise and a low-fat diet can significantly reduce triglyceride levels, which in turn lowers arterial fat deposits.

E.  Not supported.  The statements emphasize both exercise and a low-fat diet, not just exercise alone.

Answer D.

prantorboni · Answer

Decreases in the levels of triglycerides in the human bloodstream lower the occurrence and severity of fatty deposits on artery walls. Levels of triglycerides in the bloodstream of some people are significantly reduced by a regimen of regular exercise and a diet low in fat.

Which of the following can be correctly inferred from the statements above?

A. Individuals who  eat no dietary fat  do not run any risk of developing fatty deposits on their artery walls. Not stated in the argument. 
 B. Individuals who do not exercise regularly have a high risk of developing fatty deposits on their artery walls late in life. Opposite of what has been stated in the argument.  
 C. Exercise and restricted consumption of dietary fat are the  best methods  for lessening the severity of arterial fat deposits. Not stated in the argument.  
 D. A program of regular exercise and consumption of low levels of dietary fat reduces arterial fat deposits in some individuals. Conforms with all the information stated in the argument.  Correct.   
 E.  Only regular exercise  is needed to reduce arterial fat deposits in individuals who consume average levels of dietary fat. Not stated in the argument.

Answer: D.

Bunuel · Answer

OFFICIAL SOLUTION

Identify the Question Type:
 
This is an Inference question, as indicated by the words, "which...can be correctly inferred."

Untangle the Stimulus:
 
Inference stimuli rarely contain complete arguments. Rather, they contain statements from which a deduction will be made. To untangle, just read and paraphrase the statements in the stimulus, looking for connections between them. Here, lower levels of triglycerides reduces artery wall fat, and exercise combined with a low-fat diet reduces the levels of triglycerides in some people.

Predict the Answer:
 
Inference questions are typically not predictable. Here, however the statements can be combined quite easily. If a low-fat diet combined with exercise reduces the levels of triglycerides in some people, and lower triglycerides reduces the fat in arteries, then for some people, a combination of low-fat diet and exercise can reduce the fat in arteries. The answer doesn't have to come from this combination, but it’s helpful to consider it a tentative prediction to be aware of when evaluating the choices.

Evaluate the Choices:
 
(D) is correct, as it perfectly matches the predicted combination of the two statements in the stimulus.

(A) is extreme. All the stimulus says is that for some people, a low-fat diet, combined with regular exercise, reduces the levels of triglycerides in the blood. This doesn't mean that eating no fat, all by itself, wipes out any risk of developing artery fat in all people.

(B) is wrong because the stimulus only states how exercise plus low-fat diet lowers triglycerides in some people. Whether lack of exercise, by itself, leads to a “high” risk of artery fats (whatever “high” means), at a certain time - “late in life,” cannot be known from the stimulus.

(C) is incorrect because the stimulus just mentions this one approach as one that works for some people. It's possible, as far as this stimulus is concerned, that there are better approaches - for example, certain drugs. The stimulus is simply silent on other methods, so this cannot be known for sure.

(E) is not supported because the stimulus says nothing about people who consume “average” levels of dietary fat, and makes no claim whatsoever about the effects of regular exercise by itself.

TAKEAWAY:  Don't forget that an Inference on the GMAT is something that must be true from the stimulus, without any doubt. It's not enough that the statement in question might be true, or could be true.

Decreases in the levels of triglycerides in the human bloodstream

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GMAT Critical Reasoning (CR) Questions

Decreases in the levels of triglycerides in the human bloodstream

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615 to 715 in 15 Days (Ria's Strategies)

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