Final answer:
Dayparts are the segments into which a broadcast day is divided, used for scheduling programming and ads. The correct answer is D. Dayparts, which includes segments like prime time and morning drive to target specific audiences.
Step-by-step explanation:
Dayparts are the various time periods or segments into which a broadcast day is divided. Therefore, the correct answer to the question is D. Dayparts. Broadcasters use dayparts to schedule programming and advertising to reach specific audiences, effectively targeting different demographics that are more likely to be watching or listening at certain times of the day. For example, morning drive, daytime, prime time, and late night are all different dayparts each with its specific viewer profile. Understanding dayparts is crucial for advertisers to place their spots for maximum effectiveness.