40. What kind of questions should a marketing specialists think deeply whenever they need to conduct a marketing planning？
(A)when？ where？ why？
(B)when？ what？ where？
(C)why？ where？ how？
(D)what？ why？ how？.

答案：登入後查看
統計： A(0), B(2), C(1), D(3), E(0) #2728224