40. What is the author’s attitude toward the research finding?
(A) optimistic because obesity caused by AD-36 can be cured by taking vaccines
(B) optimistic because obesity may be prevented by taking vaccines
(C) pessimistic because obesity is caused mainly by genetic problems
(D) pessimistic because nothing can be done to help obese people
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統計: A(21), B(159), C(14), D(5), E(0) #908350
統計: A(21), B(159), C(14), D(5), E(0) #908350