Answer: a. No, because Clarissa didn't meet all the requirements of the offer,
Step-by-step explanation:
With regards to the information provided in the question, the offer won't be accepted because Clarissa didn't meet all the requirements of the offer.
Since Calvin told Clarissa that she can only accept the offer by mailing the money to arrive by September 2 at his university mailbox but the money eventually arrives in the mailbox by August 30th, although Calvin doesn't retrieve his mail alongside the payment until September 4th.