Answer:
The correct answer is letter "C": Highlighting an area in society that is in need of a raised awareness.
Explanation:
Marketing does not only imply companies offering their goods or services to their potential customers. Marketing can be used to promote many other different activities such as social awareness. By doing so, typically the aim is to let the population know about a problem that could affect them or not but that requires to be assisted.
Thus, if the radio stations agree on providing a week of their broadcasts to homeless shelters and collecting donations for them they are informing about an area of society that is in help and promoting individuals' actions towards the solution of that issue.