A Preemption Rate Is a Lower Rate Paid by the Advertiser

A preemption rate is a lower rate paid by the advertiser when the advertiser agrees

A) to allow the station to play the ad at any point during the day.
B) to accept a rerun of an ad that was initial run incorrectly.
C) to buy a specific amount of ad time.
D) to be bumped if another advertiser pays the higher, original rate.
E) to a year-long contract.