Two Bird Species Have Different Mating Calls,occupy Different Habitats in Nature,and

Multiple Choice

Two bird species have different mating calls,occupy different habitats in nature,and when they hybridize,the hybrids are infertile.Which isolating mechanisms maintain these species?

A) ecological isolation,behavioral isolation,and hybrid sterility
B) mechanical isolation,hybrid sterility,geographical isolation
C) ecological isolation,mechanical isolation,hybrid sterility
D) geographical isolation,temporal isolation,behavioral isolation