Which of the Following Does NOT Reflect(s)the Likely Presence of a Gene

Multiple Choice

Which of the following does NOT reflect(s) the likely presence of a gene mutation(s) ?

A) Fruit flies subjected to intense radiation breed a wider array of variable offspring.
B) A chemical leaking from the surface of an old abandoned coal mine alters a regulatory gene so that a cricket nymph develops an extra set of eyes.
C) The bacteria that cause gonorrhea,a common sexually transmitted disease,have previously been killed by penicillin; however,after continuous usage of the antibiotic,penicillin-resistant strains are now becoming prevalent.
D) Radiation causes an alteration of a DNA nucleotide sequence which is discovered when mapped,but which appears to be neither increasing nor decreasing in successive generations.
E) Offspring always have the same coloration as the parents.