Simplify the expression $\cos \left(\theta \right)\csc \left(\theta \right)\sin \left(\theta \right)\cot \left(\theta \right)$.

• A. $\frac{{\cos }^2}{\left(}$
• B. $\frac{{\cos }^2}{\left(}$
• C. $\frac{{\cos }^2}{\left(}$
• D. ${\cos }^2\left(\theta \right)\frac{1}{\sin }\left(\theta \right)$

Answer: (B)