Both C and D are the same so either could be correct, but it is not a or b that’s for sure
Answer:
The cake or brownies ARE on the counter.
Explanation:
I believe that this is what you are trying to fix, but if not I don't know what the question is.
Answer: A Mr. Prince <u>will be </u>here at 5 o'clock.
Will be indicates that it's future tense and that the action will happen but hasn't yet.