**BIOLOGY** Although they often live in the same habitat, the American toad breeds earlier in the spring than the Fowler's toad does.

What can be inferred from this information?

a
The American toad will cause the extinction of the Fowler's toad.
b
The two species interbreed throughout the spring season.
c
The two species do not interbreed because of geographic isolation.
d
The two species do not interbreed because of temporal isolation.