Assuming that the gravitational potential energy of an object at infinity is zero,the change in potential energy (final - initial) of an object of mass $m$,when moved to a height $h$ from the surface of the Earth (of radius $R$),is given by:
- A$-\frac{GMm}{R+h}$
- B$\frac{GMmh}{R(R+h)}$
- C$mgh$
- D$\frac{GMm}{R+h}$
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