Which of these is a creative method companies have recently implemented in order to reach customers?

A. Advertising products on websites and social network pages

B. Using people's identities to sent messages to their friends

C. Hiring people to playfully respond to peoples online posts

D. Promoting their product in advertisements on the radio

I would say the answer would be C. For example, many fast food chains have started using social media specifically for memes and jokes, instead of advertisements. It seems to be working very well.

C. Hiring people to playfully respond to peoples online posts

Explanation:

Companies commonly use analysts of their social media activities. For example, they may find their mentions in any social media and then try to get in contact with the people who posted in some way, possibly playfully.

So the correct answer is:

C. Hiring people to playfully respond to peoples online posts