A, B & C are good grades at Undergraduate college?

Answer 1

If you are only looking to get through, and don't plan to go on to graduate school, or if you aren't in a major in which employers look at your grades, you would be okay with an A, B or C. If you are planning on getting into one of those things, then you need B's at the very least, and if you are looking at competitive grad schools and jobs, you would need mostly A's.

Answer 2

C's aren't, but A's and B's are!