A Stunt Pilot Performs a Circular Dive of Radius 800

Multiple Choice

A stunt pilot performs a circular dive of radius 800 m. At the bottom of the dive (point B in the figure) the pilot has a speed of 200 m/s which at that instant is increasing at a rate of 20 m/s². What acceleration does the pilot have at point B?

A) (50i + 20j) m/s²
B) (20i − 50j) m/s²
C) (20i + 50j) m/s²
D) (−20i + 50j) m/s²
E) (−50i + 20j) m/s²