Use Rational Exponents to Simplify $\sqrt [ 15 ] { \mathrm { x } ^ { 12 } \mathrm { y } ^ { 9 } }$

Multiple Choice

Use rational exponents to simplify. Assume that all variables represent positive real numbers.
- $\sqrt [ 15 ] { \mathrm { x } ^ { 12 } \mathrm { y } ^ { 9 } }$

A) $\sqrt [ 5 ] { x ^ { 4 } y }$
B) $\sqrt [ 3 ] { x ^ { 4 } y ^ { 3 } }$
C) $\sqrt [ 5 ] { x ^ { 4 } y ^ { 3 } }$
D) $\sqrt [ 5 ] { x y ^ { 3 } }$