4（）

单项选择题The sentence therefore Tuangou helps change a traditional distrust of goods purchased from unknown sellers implies that （）

A．buyers used to doubt the quality of goods from unknown sellers
B．team buying is a good Chinese tradition
C．team buying is not accepted by people
D．buyers never purchase goods from unknown sellers

单项选择题What was the main concern of industrialists before the marketing concept was widely accepted（）

A．The needs of the market.
B．The efficiency of production.
C．The satisfaction of the user.
D．The preferences of the dealer.