Section A Directions: There are 10 incomplete statements herYou are required to complete e

Section A Directions: There are 10 incomplete statements herYou are required to complete each statement by choosing the appropriate answer from the 4 choices marked A), B), C) and D). You should mark the corresponding letter on the Answer Sheet with a single line through the center. What are the essential differences ___________ selling and marketing？

A.between

B.from

C.among

D.for

请帮忙给出正确答案和分析，谢谢！