51. What were the participants of the experiment asked to do after they finished their energy drink?
(A) To line up in the laboratory.
(B) To recall the drink brands.
(C) To take an alcohol breath test.
(D) To check their breath for freshness.
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統計: A(11), B(22), C(122), D(13), E(0) #490915
統計: A(11), B(22), C(122), D(13), E(0) #490915