The tour operator's brochure is a/an _____tool, being the main i

The tour operator's brochure is a/an _____tool, being the main influence on the customer's decision to buy.
A、informing
B、communicating
C、managing
D、marketing
【正确答案】：D
【题目解析】：marketing tool营销工具。句意：旅行社的宣传册是一种营销工具，是影响顾客购买决定的主要因素。