Write in Exponential Form $- \sqrt { 72 \mathrm {~m} ^ { 11 } }$

Multiple Choice

Write in exponential form. Assume all variables are positive real numbers.
- $- \sqrt { 72 \mathrm {~m} ^ { 11 } }$

A) $- 72 \mathrm {~m} ^ { 11 / 2 }$
B) $72 m^{2 / 11}$
C) $-5184 m^{2 / 11}$
D) $- 72 ^ { 1 / 2 } \mathrm {~m} ^ { 11 / 2 }$