Which of the Following Statements Concerning Advertising on Cable Television

Which of the following statements concerning advertising on cable television is true?

A) Cable time can only be purchased on a national level.
B) Cable time can be purchased on a national, regional, or local level.
C) Spot cable advertising revenues have decreased dramatically over the past five years.
D) Local cable systems provide advertisers with extensive research information on demographics, lifestyles, and viewership patterns.
E) Cable networks discourage the purpose of marketers to reach a large number of viewers across the country with a single media buy.