Which sentence best supports the idea that chickadees take action to keep their bodies warm at night?

A.
This means that sometimes there is well over a 100-degree difference between a chickadee’s body and the air temperature only an inch away. (paragraph 3)

B.
Without any feathered insulation, heat would quickly be lost and much energy wasted in attempting to keep their toes as warm as the rest of the body. (paragraph 6)

C.
Since they don’t have crops in which they can store food to eat later, they must eat enough each day to survive the long, 18-hour night. (paragraph 9)

D.
They do not roost together in flocks as some birds do but spend the night alone. (paragraph 10)