12. A researcher studying drug addicts found that, on
average, they tend to manipulate other people a
great deal more than nonaddicts do. The researcher
concluded that people who frequently manipulate
other people are likely to become addicts.
Which of the following, if true, most seriously weak-
ens the researcher's conclusion?
(A) After becoming addicted to drugs, drug addicts
"learn to manipulate other people as a way of
"obtaining drugs.
(B) When they are imprisoned, drug addicts often
"use their ability to manipulate other people to
"obtain better living conditions.
(C) Some nonaddicts manipulate other people more
"than some addicts do.
(D) People who are likely to become addicts exhibit
"unusual behavior patterns other than
"frequent manipulation of other people
(E) The addicts that the researcher studied were
"often unsuccessful in obtaining what they wanted when they manipulated other people.
The answer is A, but my choice is D. The text tells us that manipulation leads people to become addicts, and the choice D informs us that other reasons lead people to become addicts, so I think the choice D stands out to weak the position in the text.
Please help me. Thank you!
average, they tend to manipulate other people a
great deal more than nonaddicts do. The researcher
concluded that people who frequently manipulate
other people are likely to become addicts.
Which of the following, if true, most seriously weak-
ens the researcher's conclusion?
(A) After becoming addicted to drugs, drug addicts
"learn to manipulate other people as a way of
"obtaining drugs.
(B) When they are imprisoned, drug addicts often
"use their ability to manipulate other people to
"obtain better living conditions.
(C) Some nonaddicts manipulate other people more
"than some addicts do.
(D) People who are likely to become addicts exhibit
"unusual behavior patterns other than
"frequent manipulation of other people
(E) The addicts that the researcher studied were
"often unsuccessful in obtaining what they wanted when they manipulated other people.
The answer is A, but my choice is D. The text tells us that manipulation leads people to become addicts, and the choice D informs us that other reasons lead people to become addicts, so I think the choice D stands out to weak the position in the text.
Please help me. Thank you!

















