Which sentence from the article best supports the idea that African gray parrots can carry on real conversations?

Question

A.[African gray parrots] also move their tongues forward and backward in order to mimic human speech.
B.African gray parrots sport gray plumage, dark eyes, and a striking red tail.
C.African gray parrots are social animals that make steadfast, loyal companions.
D.[African gray parrots] can also combine words to communicate in ways that makes sense.

Answer 1

D.[African gray parrots] can also combine words to communicate in ways that makes sense.