An expository article is usually about explaining something or talking about it. So if it's a true story and you write it like a life story then yes it can be. If it's just a fictional story you want to write then no.
Answer: A. All of the kittens are black with white paws.
Explanation: Subject-verb agreement is simply to use singular verbs with singular subjects and plural verbs with plural subjects. In the given sentence the subject is "all of the kittens" this is a plural subject, therefore, we need to use a plural verb to have a correct subject-verb agreement, from the given options, the only one that uses the correct conjugation is option A: All of the kittens are black with white paws.
B would be the answer to this
Memorize is the answer. The rest are all words related to democracy. Hope this helps :)