Major Course Group

I want to apply for TAG for UCD but I’m afraid that I won’t be able to meet the requirements because I’m not sure that I satisfy this requirement: “Candidates must complete courses comparable to the following UC Davis courses with a GPA of at least 2.50 for each of the three course groups.”

The course group in question is Mathematics, specifically 21A & 21B.

Back in high school I passed the AP Calc AB exam with a 4, so my counselor placed me in the equivalent of 21B in my first semester of CC, which I got a C in. I went on to 21C and will probably get another C. Now I realize that I am in danger of not meeting the requirements, but I want to know that if I take the 21A class equivalent this summer semester and get an A, will that bring the GPA up to an acceptable level even though I have taken the subsequent classes and the AP exam?

Please help me, and thank you!