In 2005,the Airwaves of KFFI-AM Were Saturated with Commercials That

In 2005,the airwaves of KFFI-AM were saturated with commercials that asked listeners to dial advertisers' toll-free numbers or visit their Web sites.The approach accounted for nearly half the advertising on KFFI and it's a big reason why the station has climbed nearly to the top of the Los Angeles market in revenues and to No.4 nationwide.In this example,a broadcast medium is prospering from the use of:

A) unduplicated marketing.
B) customized marketing.
C) direct-response advertising.
D) advocacy selling.
E) direct-sales advertising.