- PowerScore Staff
- Posts: 8917
- Joined: Feb 02, 2011
- Sat Jan 20, 2018 12:00 am
#63991
Complete Question Explanation
Must Be True—#%. The correct answer choice is (E)
Here information is provided about an experiment in which volunteers were placed on a low-fat diet.
Those with a type B lipid profile have a higher risk for heart disease than those with type A, and the
type B volunteers lowered their cholesterol levels during the experiment. The type A volunteers, on
the other hand, experienced no benefits from the experiment, and 40 percent even became type B’s
(meaning that their risk of heart disease actually increased).
The stimulus is followed by a Must Be True question, so the correct answer choice can be confirmed
by the information provided in the stimulus.
Answer choice (A): Since the stimulus provides no information regarding the portion of volunteers
who saw some risk reduction, this choice fails the Fact Test, cannot be confirmed by the information
provided, and must be incorrect.
Answer choice (B): The author provides that the type B volunteers lowered their cholesterol levels,
but no information is provided to allow comparison of the cholesterol levels of the two groups.
Answer choice (C): We are provided with no information regarding any other aspects of the
volunteers’ lives, so this choice fails the Fact Test.
Answer choice (D): There is no specific explanation for the change in lipid profiles, and the
group that experienced the cholesterol level decrease (type B) was different from the group that
experienced changes in lipid profile (type A).
Answer choice (E): This is the correct answer choice. Since 40 percent of the type A volunteers
shifted to type B, thus increasing their risk for heart disease, we know that at least some volunteers
increased this risk. We might note in this case the somewhat counter intuitive link between lower fat
and higher risk.
Must Be True—#%. The correct answer choice is (E)
Here information is provided about an experiment in which volunteers were placed on a low-fat diet.
Those with a type B lipid profile have a higher risk for heart disease than those with type A, and the
type B volunteers lowered their cholesterol levels during the experiment. The type A volunteers, on
the other hand, experienced no benefits from the experiment, and 40 percent even became type B’s
(meaning that their risk of heart disease actually increased).
The stimulus is followed by a Must Be True question, so the correct answer choice can be confirmed
by the information provided in the stimulus.
Answer choice (A): Since the stimulus provides no information regarding the portion of volunteers
who saw some risk reduction, this choice fails the Fact Test, cannot be confirmed by the information
provided, and must be incorrect.
Answer choice (B): The author provides that the type B volunteers lowered their cholesterol levels,
but no information is provided to allow comparison of the cholesterol levels of the two groups.
Answer choice (C): We are provided with no information regarding any other aspects of the
volunteers’ lives, so this choice fails the Fact Test.
Answer choice (D): There is no specific explanation for the change in lipid profiles, and the
group that experienced the cholesterol level decrease (type B) was different from the group that
experienced changes in lipid profile (type A).
Answer choice (E): This is the correct answer choice. Since 40 percent of the type A volunteers
shifted to type B, thus increasing their risk for heart disease, we know that at least some volunteers
increased this risk. We might note in this case the somewhat counter intuitive link between lower fat
and higher risk.
