In the question below, fill the gap with the most appropriate option:
Had he come that day, the problem would still not have been solved

• A.He came that day, but the problem was not solved
• B.He did not come that day, but the problem was solved
• C.He did not come that day, and the problem was not solved
• D.He did not come that day, but his presence would not have solved the problem
• E.