A new laptop costs about _____ of a second-hand one.

A．the price of three times

B．three times the price

C．as much as the three times price

D．three times more than the price

超市为了增加客流量，吸引更多的客户光顾，而把一些广大客户熟悉的产品的价格定得很低，是采取（）的策略。

A.组合定价

B.关联定价

C.招徕定价

D.差别定价