Due to the costs of production, the major news source that would NOT emerge as a major entity until the creation of cable television would be:

Question

Due to the costs of production, the major news source that would NOT emerge as a major entity until the creation of cable television would be: 
Answer  
    ABC.  
   FOX.  
   CBS.  
   NBC.

Ms. Sue · Answer

ABC, CBS, and NBC were all major news sources until the creation of cable TV.