48. Which of the following is NOT mentioned as a way stores use to improve sales?
(A) Giving free samples.
(B) Studying psychology.
(C) Analyzing sales records.
(D) Conducting market surveys.
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統計: A(188), B(22), C(19), D(7), E(0) #3036976
統計: A(188), B(22), C(19), D(7), E(0) #3036976