Ginkgo Trees Are Native to Asia but Are Now Cultivated

Ginkgo trees are native to Asia but are now cultivated widely in North America.Thus,they are divided into two geographically separated groups.According to Mayr's framing of the biological species concept,these populations could be classified as belonging to the same species if they

A) are reproductively isolated.
B) have formed a large hybrid zone.
C) exchange genes across the Pacific Ocean.
D) have different evolutionary ancestries.
E) are still potentially capable of exchanging genes.