Raise to the Power or Find the Root $\sqrt [ 3 ] { - 27 a ^ { 9 } b ^ { 3 } }$

Multiple Choice

Raise to the power or find the root. Assume that all variables represent positive numbers. Write with only positive
exponents.
- $\sqrt [ 3 ] { - 27 a ^ { 9 } b ^ { 3 } }$

A) $3 a ^ { 12 } b ^ { 6 }$
B) $27 a ^ { 3 } b$
C) $- 3 a ^ { 3 } b$
D) $3 a ^ { 3 } b$