69.

Answer and Explanation

Your Answer is

Correct Answer is D

Explanation

The first sentence "with their elongated bodies, curved necks, and holy legs, these birds are like visitors from another era" and the second sentence "sandhill cranes have graced the earth for at least 9 million years". There is no obvious transition or causal relationship between the preceding and following sentences, but the author emphasizes the latter sentence here to pave the way for further explanation below. Indeed, the table emphasizes. D is correct.