An Airplane Climbs at a Rate of 66

Multiple Choice

An airplane climbs at a rate of 66.8 feet per minute. It descends at twice the rate that it climbs. Assuming it descends at a constant rate, how many feet will the airplane descend in 30 minutes?

A) 96.8
B) 133.6
C) 1,002
D) 2,004
E) 4,008