A Cage Containing Male Mosquitoes Has a Small Earphone Placed

A cage containing male mosquitoes has a small earphone placed on top through which the sound of a female mosquito is played.All the males immediately fly to the earphone and go through all of the steps of copulation.What is the best explanation for this behavior?

A) The males learned to associate the sound with females.
B) Copulation is a fixed action pattern,and the female flight sound is a sign stimulus that initiates it.
C) The sound is a form of a visual signal,which causes the males to attempt to mate.
D) The reproductive drive is so strong that when males are deprived of females,they will attempt to mate with anything that has even the slightest female characteristic.