The Federal Government's Licensing of Broadcasting Was Based Primarily on

The federal government's licensing of broadcasting was based primarily on

A) the fact that broadcasting is a national medium.
B) the scarcity of broadcasting frequencies.
C) the fact that broadcasting was invented after the First Amendment was adopted.
D) the desire of national officials to control the content of broadcast news and entertainment.
E) a desire to censor reporters so that they would stop criticizing governmental officials.