Use the Fundamental Identities to Simplify the Expression $$\sin ^ { 2 } x \left( \cot ^ { 2 } x + 1 \right)$$

Multiple Choice

Use the fundamental identities to simplify the expression.
- $$\sin ^ { 2 } x \left( \cot ^ { 2 } x + 1 \right)$$

A) $- 1$
B) $\tan ^ { 2 } x$
C) $\cos ^ { 2 } x + 1$
D) 1