What form of media has both challenged and been successfully co-opted by the traditional media?

Answer: Cable television

Explanation:

Cable television is the form of media that provides television services to the people. It is the mode in which radio frequencies are used along with the cables to deliver the television programs.

According to the traditional media, their most preferred choice for marketing and advertisement is cable television. For advertising films, ads, music etc so that it can reach audience, cable television is the best option as there is numerous amount of viewers of television programs.

Traditional media can telecast their radio session, media content, television programs through cable television which can reach every person who has cable television connection and thus content can spread more easily compared to other services.