Eli was comparing the temperatures at a desert site and a coastal sit that have the same latitude. He noticed that the nighttime temperature dropped significantly at the desert site but only slightly at the coastal site. This difference is mostly caused by.

A.lower wind speeds in the desert than at the coast.*****

B. less water vapor in the desert than at the coast.

C.lower carbon dioxide levels in the desert than at the coast.

D. less vegetation in the desert than at the coast.