$$\sin^{4}\theta + \cos^{4}\theta$$ in terms of $$\sin \theta$$ can be written as:

A

$$2\sin^{4}\theta - 2\sin^{2}\theta + 1$$

B

$$2\sin^{4}\theta - 2\sin^{2}\theta - 1a$$

C

$$2\sin^{4}\theta + 2\sin^{2}\theta - 1$$

D

$$2\sin^{4}\theta - 2\sin^{2}\theta$$