It depends on if you have your required amount of credits for mathematics. If you do, then you don’t have to take any more mathematics classes, but if you don’t then you’ll still have to take an alternative mathematics class/es in order to graduate. Classes that are dropped will appear on your transcript as so
The ears are involved in balance, but it's more than just them.
Your eyes are also important, as well as your body's sense of where it is in space.
Considering the answers;
A. are still sibling species
B. shared a common ancestor more recently with each other than either did with the other two species
C.May merge into a single species if their hybrids remain fertile over the course of many generations.
D. A and B only
E. A, B, and C
The answer will be E.
If no other species can hybridize, then species W and Y are still sibling species, shared a common ancestor more recently with each other than either did with the other two species and also may merge into a single species if their hybrids remain fertile over the course of many generations.