The correct answer is A.
The word “apprise” means to inform someone of something, especially something important or significant. In this case, the committee members had not been informed of the contents of the document. The preposition “of” is used to indicate the object of an action, and in this case, the object of the action is the contents of the document.
The other options are not correct because they do not make sense in the context of the sentence. The preposition “on” is used to indicate a location or position, and the preposition “for” is used to indicate a purpose or reason. The preposition “from” is used to indicate a source or origin.
In conclusion, the correct answer is A. The committee members had not been apprised of the contents of the document.