Persuasive writing is used to conviced someone(s) to do something or change something.
Choice A is correct because the subject of the sentence are the cookbooks, PLURAL. The only PLURAL verb to go along with the PLURAL subject is the verb, "are."
Two feuding families in Verona have an ancient grudge that fight, get themselves dirty, shed blood, and fight over whom pretty Verona shall marry.
When cooking food in a restaurant, you are permitted from wearing nail polish or artificial nails unless you are wearing gloves.