Two Species of Salamanders Have Overlapping Territories,and They Successfully Mate

Multiple Choice

Two species of salamanders have overlapping territories,and they successfully mate and produce eggs.However,most of the eggs fail to hatch.Only 10% of them hatch,but the tadpoles are weak and are almost all killed by predators.The few tadpoles that exit the water have weak bones and soon die.This is an example of

A) hybrid breakdown.
B) gametic isolation.
C) hybrid inviability.
D) ecological isolation.
E) hybrid infertility.