Which of the Following Is a Reason Why Interested Parties

Which of the following is a reason why interested parties should post comments and critiques on blogs and e-commerce sites?

A) An opportunity to build their personal brands
B) To help people better understand which posts are appropriate and which are not
C) To take advantage of self-promotion opportunities
D) To remind readers of the importance of their work
E) To redirect readers to other sites through the use of teasers