Which Statement About Rhagoletis Pomonella Is True

Which statement about Rhagoletis pomonella is true?

A) The apple- and hawthorn-feeding flies differ in their odor preferences.
B) The apple- and hawthorn-feeding flies can be considered incipient species because they show partial polyploidy.
C) The apple- and hawthorn-feeding flies emerge seasonally at approximately the same time.
D) The apple-laying fly is a distinct species from the hawthorn-laying fly.
E) Larvae of hawthorn-feeding flies grow more rapidly on apples than those of apple-feeding flies.