Which of the Following Reflect(s) the Likely Presence of (A)

Multiple Choice

Which of the following reflect(s) the likely presence of (a) gene mutation(s) ?

A) Fruit flies subjected to intense radiation produce 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 in a DNA nucleotide sequence, which is discovered when mapped, but which appears to be neither increasing nor decreasing in successive generations.
E) All of the choices are correct.