The Justification for Delegation of Authority to the FCC to Regulate

The justification for delegation of authority to the FCC to regulate the electronic media in 1934 was

A) allowing people to freely communicate their ideas will provide a larger number of ideas to consider.
B) the truth cannot be considered libelous.
C) encouraging the publication and dissemination of a wide variety of political ideas offers citizens a diversity of opinions and perspectives.
D) some electronic media require broadcast frequencies that are scarce and these need to be regulated to insure the orderly transmission of programs.
E) to limit the language and type of sexual material that broadcasters might use.