08A Satellite Is Held in Orbit by a 1,000-N Gravitational

0.8A satellite is held in orbit by a 1,000-N gravitational force.Each time the satellite completes an orbit of circumference 80,000 km,the work done on it by gravity is:

A) 0.8×10⁸ J.
B) 0.8×10¹¹ J.
C) 0.13×10⁸ J.
D) 0.
E) ​0.13×10¹¹ J.