Is a Reason Users Have "Unliked" a Brand's Facebook Page

Multiple Choice

is a reason users have "unliked" a brand's Facebook Page?

A) The brand ceases to be popular and users move on to a new brand's Facebook Page.
B) The brand posts too frequently on trivial or controversial topics.
C) Users tire of not being able to contribute to the conversation.
D) Users want to protest the presence of advertisements on Facebook.
E) The Page isn't updated and users lose interest.