I would say
C) Simple yes/no questions.
Answer:
adverb clause
Explanation:
Anytime you see the keyword modifies\modify, you will automatically know that it will be an 'adverb' answer.
I am joyous to assist you anytime.
Answer:hello
Explanation:sorry for wasting ur time but I think it’s the second option
C would be the answer to this
In a way i would prefer a question because how can you get the answer without given the question or visa versa. So if it would be question the explanation would be it helps you decides who,when,what,where........
And if it would be answer it would be answer helps you can elaborate to help you know more. hope this helps. i tried my best