Which of the Following Likely Reflects the Presence of One

Multiple Choice

Which of the following likely reflects the presence of one or more gene mutations?

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.