Two point particles with opposite charges are separated by a distance d. Also, q is the magnitude of charge of both particles. Now, these particles are placed in a new environment with 150% times greater permittivity, compared to the outer space. What is their electric potential energy if their distance is twice their original distance?
A. (-2kq²)/5d
B. (-kq²)/3d
C. (3kq²)/d
D. (-2kq²)/3d