When Hybrid Offspring Are at a Fitness Disadvantage and Reinforcement

When hybrid offspring are at a fitness disadvantage and reinforcement does not occur, which of the following is likely to occur?

A) The spreading of hybrids through both populations, resulting in the combining of both gene pools and no new species
B) An adaptive radiation
C) The formation of a new species via polyploidy
D) The formation of a hybrid zone
E) None of the above