By citing the book The Tipping Point, the author intends to
A. [A] analyze the consequences of social epidemics
B. [B] discuss influentials' function in spreading ideas
C. [C] exemplify people's intuitive response to social epidemics
D. [D] describe the essential characteristics of influentials.
The author suggests that the "two-step-flow theory"
A. [A] serves as a solution to marketing problems
B. [B] has helped explain certain prevalent trends
C. [C] has won support from influential
D. [D] requires solid evidence for its validity
微信支付 
支付宝支付