单选题
Why are great TV networks, ABS, CBS and NBC mentioned in the passage?
A、
As examples of breakup of mass audiences
B、
In comparison with Tele-communications, Inc. of Denver
C、
To show their capability of providing lots of channels
D、
To present their prosperity in advertising among viewers
【正确答案】
A
【答案解析】
文章中提到ABS，CBS and NBC的危机突出了the dramatic breakup of mass audiences．所以答案应该是A。
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