Two spherical objects of mass M are held a small distance apart. The radius of each object is r.

Point P is the midpoint between the objects and is a distance R from the surface of each object. What is the gravitational potential at point P?

A. $- \frac{{GM}}{{{{\left( {r + R} \right)}^2}}}$

B. $- 2\frac{{GM}}{{r + R}}$

C. $- \frac{{GM}}{{r + R}}$

D. 0

B