A 300-Kg Object Moves in a Potential U(x) = a

A 3.00-kg object moves in a potential U(x) = A , where A is a positive constant. When the object is located at x = -1.50 m, it has a kinetic energy (2.00 m) A. What is the range of the object's motion?

A) -10.5 m to +10.5 m
B) -1.50 m to 1.50 m
C) -0.50 m to +0.50 m
D) -2.00 m to +2.00 m
E) -3.50 m to +3.50 m