42. Which of the following is an example of a mentally active sedentary behavior?
(A) Watching television.
(B) Listening to music passively.
(C) Reading a book.
(D) Sitting quietly without doing anything.
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統計: A(0), B(0), C(6), D(0), E(0) #3915443
統計: A(0), B(0), C(6), D(0), E(0) #3915443