Birds Regulate Their Body Temperatures at Approximately
A)15 ^$\circ$
B)31 ^$\circ$

Birds regulate their body temperatures at approximately

A) 15 ^$\circ$
B) 31 ^$\circ$
C) 22 ^$\circ$
D) 40 ^$\circ$
E) 49 ^$\circ$