Use the squared idenities to simplify 2sin^2x sin^2x

Use the squared idenities to simplify 2sin^2x sin^2x.

A. 3-4cos(2x)+cos(4x)/4
B. 3+4cos(2x)+cos(4x)/4
C. 3+4cos(2x)-cos(4x)/4
D. 3-4cos(2x)-cos(4x)/4