An Artificial Earth Satellite Is Moved from a Circular Orbit

An artificial Earth satellite is moved from a circular orbit with radius R to a circular orbit with radius 2R.During this move:

A) The gravitational force does no work.
B) The gravitational force does positive work.
C) The gravitational force does negative work.
D) The work done by the gravitational force cannot be determined without knowing the path of the satellite.
E) The work done by the gravitational force cannot be determined without knowing what force caused the satellite to change its orbit.