Carlos Uses a Company Blog to Announce New Merchandise, Get

Carlos uses a company blog to announce new merchandise, get feedback from customers, and allow customers to share information about his products. His frequent customers use the blog on a regular basis to keep up with what is happening with the company's products and to share product preferences. This is called

A) search engine marketing.
B) social shopping.
C) blog marketing.
D) e-communication.
E) e-advertising.