Answer the Question in the Passage Below from One of the Perspectives

Answer the question in the passage below from one of the perspectives described in the text.
Shelley and Maurita are both disturbed by their C+ final grades in Mr. Carlton's geography class, and they request that he recheck his grade book. He does so and finds that, indeed, he had made mistakes. Maurita was supposed to get a B- and Shelley was supposed to get a C-. He gives Maurita the B- and allows Shelley to keep the C+. Should he have lowered Shelley's grade to a C-? Construct one argument whose conclusion is that he should, and construct one argument whose conclusion is that he should not. Be sure to spell out clearly any moral principles in the arguments.