Which of the Following Is True of Brands,organizations,and Nonprofits That

Which of the following is true of brands,organizations,and nonprofits that use Facebook?

A) They have thus far been unsuccessful in their attempts to use the platform to create viral marketing campaigns.
B) Their pages are public and are thus subject to search engine indexing.
C) They are restricted from communicating directly with fans and interested stakeholders due to risks of hacking.
D) Their ability to optimize search engine results is very low.