A Cat Lies Crouched on Level Ground 50 Feet Away

Multiple Choice

A cat lies crouched on level ground 50 feet away from the base of a tree. The cat can see a bird's nest directly above the base of the tree. The angle of elevation from the cat to the bird's nest is 40°. To the nearest foot, how far above the base of the tree is the bird's nest?

A) 32
B) 38
C) 42
D) 60
E) 65