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

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"

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

Reason : 

Advertising Policies - Editorial

Style and spelling

x Promotions that do not use the features of the ad unit for their intended purpose

Examples: Ads that don't contain promotional content, text ads missing a line of text, phone numbers in ad text, image ads that only occupy part of the image ad unit, text ads that have the third line of text running into the display URL, using the URL field as an additional line of text, using an email address in place of a phone number when using the call extension feature

x Promotions that are inconsistent with the clear and informational presentation style of the Google Search results

Examples: Ads that contain an exclamation mark in the ad headline, ads that use bullet points or numbered lists, ads containing a call to action such as "click here", excessive or gimmicky use of repetition, such as the following: fllllowers, flowers-flowers-flowers

x Promotions that do not use commonly accepted spelling, grammar, or spacing

Examples: "Flowers here buy" or "Buy flwres here" instead of "Buy flowers here"; excessive or gimmicky use of spacing, such as the following: f l o w e r s, buyflowershere

Read more at https://support.google.com/adwordspolicy/answer/6021546?hl=en