What is the most cost effective way to make sure potential customers can still reach him?

A self-employed motional speaker is active on several forms of social media including Twitter, Facebook and YouTube. However, he does not have the time or resources to maintain a presence on other social media site .

What is the most cost effective way to make sure potential customers can still reach him?
A . Ignore the other sites because his primary audience does not participate on them.
B . Hire someone to create and maintain his online presence on other social media sites.
C . Create placeholder pages that redirect visitors to his Web site or other social media sites.
D . Expand his marketing efforts to reach potential customers through traditional marketing (direct mail advertising, etc)

Answer: C