You take one class each term. If your current grade point average $($GPA$)$ is $3\mathrm{.}0$ and you get an A $($which is worth $4\mathrm{.}0),$ what happens to your GPA?

a$.$ It rises because the marginal grade was above the average grade.

b$.$ It falls because you only take one class per term.

c$.$ There is no way to answer this question because you aren't given your total grade points.