Perform the Multiplication and Use the Fundamental Identities to Simplify $( \sin x - \cos x ) ^ { 2 }$

Multiple Choice

Perform the multiplication and use the fundamental identities to simplify.​ $( \sin x - \cos x ) ^ { 2 }$ ​

A) $1 + \sin x + \cos x$ ​
B) $2 - 2 \sin x \cos x$ ​
C) $1 - 2 \sin x \cos x$ ​
D) $1 + 2 \sin x + \cos x$ ​
E) $$1 - \sin x \cos x$$ ​