Which of the Following Statements About Network Advertising Is True

Which of the following statements about network advertising is true?

A) Using network advertising can help simplify the purchase of television media time for national advertisers.
B) The major networks offer the most popular programs and still dominate the prime-time viewing period.
C) The high cost of network time can be a drawback to advertisers with limited media budgets.
D) Advertisers use network advertising to reach large audiences with one media buy.
E) All of the above statements about network advertising are true.