How is the present value interest factor related to the future value interest factor?

A) The present value and future value factors are equal to each other.

B) The present value factor is the exponent of the future value factor.

C) The future value factor is the exponent of the present value factor.

D) There is no relationship between these two factors.

E) The factors are reciprocals of each other.

I tried option A previously & it was wrong. Any help would be appreciated.