On the Hawaiian island or Kauai, Teleogryllus oceanicus crickets came from

[Dubzzzzz]

Australia and western Pacific islan? On the Hawaiian island or Kauai, Teleogryllus oceanicus crickets came from Australia and western Pacific islands. Male crickets advertised their reproductive availability by broadcasting an auditory display by using specialized anatomical features. The parasitic fly, Ormia ochracea fly, invaded from North America. In the 1990's, there was an intense fly infestation parasitizing one-third of the crickets. In a 2001 survey, only one male was heard singing and in 2003 no males were heard singing. The crickets were still there, in fact the cricket population was larger than it had been for years but few males still had wings with functional chirping equipment. The silencing came from changes in only one or two genes. If you were the investigator of the reason for why the change occurred so quickly, you might reasonably hypothesize that the resulting change in the crickets is a matter of

a. natural selection and genetic drift
b. natural selection alone
c. genetic drift alone
d. artificial selection and gene flow
e. artificial selection and genetic drift

Thank You!