Final answer:
The advantages of audience selectivity, no ad competition, and personalization are characteristic of direct mail, due to its targeted and individualized approach.
Step-by-step explanation:
The advantages of audience selectivity, no ad competition, and personalization most closely apply to C) direct mail. This medium allows for specific targeting of individuals based on demographic information. Direct mail offers an advertiser the advantage of a tailored message intended for a particular recipient, unlike the mass messaging strategies often used in newspapers, television, and radio. With direct mail, there is also no competition within the same piece of mail, as there might be within a newspaper ad section or during a commercial break on television or radio.