Simplify Write the Answer Using Positive Exponents Only $( - 2 p q r ) ^ { 2 }$

Multiple Choice

Simplify. Write the answer using positive exponents only.
- $( - 2 p q r ) ^ { 2 }$

A) $4 p ^ { 2 } q ^ { 2 } r ^ { 2 }$
B) $- 4 p ^ { 2 } q ^ { 2 } r ^ { 2 }$
C) $- 4 p q r$
D) $\text { 4pqr }$