What Is the Distance Between A $-2.00 \mu \mathrm{C}$ Charge and A

What is the distance between a $-2.00 \mu \mathrm{C}$ charge and a $-3.00 \mu \mathrm{C}$ charge if their potential energy is $0.491 \mathrm{~J}$ ?

A) $25.0 \mathrm{~cm}$
B) $11.0 \mathrm{~cm}$
C) $3.14 \mathrm{~cm}$
D) $15.5 \mathrm{~cm}$
E) $0.911 \mathrm{~cm}$