According to ad policies, what types of words, phrases, or characters can not be included in an AdWords text ad?

A) All of these answers are correct
B) Ads can not contain words that are not directly related to the keyword that the ad is targeting
C) Ads cannot use exclamation points (!) or question marks (?).
D) Ads cannot use call-to-action phrases such as "click here" or "See this site"

Ans: 
D) Ads cannot use call-to-action phrases such as "click here" or "See this site"