Write in Exponential Form $- 9 \sqrt { 6 m ^{11 }}$

Multiple Choice

Write in exponential form. Assume all variables are positive real numbers.
- $- 9 \sqrt { 6 m ^{11 }}$

A) $- 9 \cdot 6 ^ { 1 / 2 } \mathrm {~m} ^ { 11 / 2 }$
B) $486 \mathrm {~m} ^ { 2 / 11 }$
C) $( - 9 \cdot 6 ) ^ { 1 / 2 } \mathrm {~m} ^ { 11 / 2 }$
D) $- 486 \mathrm {~m}^{ 11 / 2}$