I purposely did not post the answer to my Romans 1 Quiz earlier. I hoped to generate enough interest to get someone to ask for the answers. Well, here are my answers anyway.
1. A, B, and C all are right.
2. I'm not sure I can find the most explicit about David being the father of the Messiah. These scriptures all relate to Messiah being a part of the David kingdom. That of course is a little different than son of David.