Simplify the Expression Using the Power Rule $\left[ \left( - 7 ^ { 5 } \right) \right] ^ { 10 }$

Multiple Choice

Simplify the expression using the power rule.
- $\left[ \left( - 7 ^ { 5 } \right) \right] ^ { 10 }$

A) $( - 7 ) ^ { 50 }$
B) $( - 49 ) ^ { 50 }$
C) $( - 49 ) ^ { 5 }$
D) $( - 7 ) ^{ 15 }$