The Gravitational Potential Energy U Is Related to the Gravitational $U \propto \int \vec { F } \cdot d \vec { r }$

The gravitational potential energy U is related to the gravitational force F by an equation of the form

A) $U \propto \int \vec { F } \cdot d \vec { r }$
B) $U \propto \int F _ { r } d t$
C) $U \propto r F _ { y }$
D) $U \propto t \vec { F } _ { \gamma }$