Which of the Following Statements About Network Advertising Is True

Which of the following statements about network advertising is true?

A) Using network advertising significantly complicates the purchase of television media time for national advertisers.
B) The networks do not share their advertising revenue with affiliates that allowed the ads to be shown on their stations.
C) The high cost of network time can be a drawback to advertisers with limited media budgets.
D) National advertisers have to negotiate with both network and local affiliates when they want to make a media buy.
E) All of the above statements about network advertising are true.