Bunuel
It is commonly believed that substituting in one’s diet artificial sweeteners having zero calories for sugar, a calorie-rich substance, will result in weight loss, given that weight loss occurs when caloric intake is less than caloric expenditure. However, recent studies examining the impact of consuming artificial sweeteners reveal that, on average, those who consumed artificial sweeteners gained more weight than those who did not.
Which of the following, if true, most helps to explain why the studies’ findings conflicted with the common belief about artificial sweeteners?
A. People who are overweight are more likely to switch to artificial sweeteners from sugar than people who are not.
B. Consuming sweet food stimulates the release of insulin, which, if unaccompanied by the consumption of sugar, stimulates one’s appetite.
C. Those who replace sugar in their diet with artificial sweeteners are likely to consume greater quantities of artificial sweeteners than they had of sugar.
D. Not all those who switch to artificial sweeteners from sugar are more health-conscious than those who do not.
E. Often, people continue to have some quantities of sugar in their diet even when they have started using artificial sweeteners.
Target Test Prep Official Explanation:To correctly answer this question, we need to find a choice that explains why the studies’ findings, “on average, those who consumed artificial sweeteners gained more weight than those who did not,” conflicted with the common belief “substituting in one’s diet artificial sweeteners having zero calories for sugar, a calorie-rich substance, will result in weight loss.”
(A) People who are overweight are more likely to switch to artificial sweeteners from sugar than people who are not.This choice explains the wrong thing. It could explain why people who switch to artificial sweeteners would weigh more than people who don’t. However, the correct answer to the question must explain something else: those who consumed artificial sweeteners gained more weight. Since the fact that people are overweight does not explain why they gained more weight, this choice is incorrect.
(B) Consuming sweet food stimulates the release of insulin, which, if unaccompanied by the consumption of sugar, stimulates one’s appetite.
Correct AnswerTo see why this choice is correct, we must make a common sense connection between the fact that release of insulin “stimulates one’s appetite” and gaining weight. Logically, something that stimulates a person’s appetite would cause that person to gain weight.
So, notice that what this choice indicates is that consuming sweet foods that contain artificial sweeteners rather than sugar will stimulate one’s appetite because, when such foods are consumed, insulin is released without consumption of sugar.
So, this choice explains why those who consumed artificial sweeteners gained more weight than those who did not.
(C) Those who replace sugar in their diet with artificial sweeteners are likely to consume greater quantities of artificial sweeteners than they had of sugar.The fact that people consumed greater quantities of artificial sweeteners makes no difference because, according to the passage, artificial sweeteners have zero calories anyway. So, consuming them in any quantities should by itself cause people to gain weight.
(D) Not all those who switch to artificial sweeteners from sugar are more health-conscious than those who do not.The fact that not all of those who switch to artificial sweeteners are more health conscious doesn’t explain why those people gained more weight. OK, so some are not more health conscious, and others are more health conscious than those who continued to eat sugar. We still don’t know why they gained more weight on average.
If this choice said that ALL people who switched were less health conscious, then it might indicate why the people who switched gained more weight, but the fact that some were more health conscious while others weren’t doesn’t help us to understand what occurred.
(E) Often, people continue to have some quantities of sugar in their diet even when they have started using artificial sweeteners.The fact that people continued to consume some sugar doesn’t explain why they gained weight. After all, they were still consuming less sugar than before. So, we would have expected them to have lost weight rather than gained it.
Answer: B