A Male Mountain Dusky Salamander (Desmognathus Ochrophaeus) Normally Injects a Courtship

A male mountain dusky salamander (Desmognathus ochrophaeus) normally injects a courtship pheromone into the female's circulatory system with his teeth. When Houck and Reagan (1990) artificially treated females with either a pheromone-containing elixir or a saline solution, they found that the females that received the pheromone

A) actually took longer to become sexually receptive and to mate than the females that received the saline.
B) became sexually receptive and mated faster than did the females that received the saline.
C) did not become sexually receptive at that time. It turned out that the visual signals the male produced were responsible for the receptivity.
D) were no longer attractive to the male since he was not the one that applied the pheromone.