Given below are four jumbled sentences. Select the option that gives their correct order.

A) Yams are members of the genus Dioscorea and are in their own special family, Dioscoreaceae.

B) Yams and sweet potatoes are totally different plants and are not even closely related.

C) Sweet potatoes, on the other hand, come from the species Ipomoea batatas, in the morning glory family, Convolvulaceae.

D) In fact, these tasty starchy veggies are actually in two different plant families entirely.