Plants from the Genus Solanum Include Such Common Vegetables as Potatoes

Plants from the genus Solanum include such common vegetables as potatoes and eggplants. The many species include some plants native to tropical West Africa as well as closely related species native to tropical South America. What might you reasonably conclude?

A) The trunks of the plants were used as canoes to cross the Atlantic Ocean.
B) Convergent evolution occurred.
C) The group must have mutated twice.
D) West Africa and South America were once joined.