Simplify the Expression $$\frac { \left( x ^ { - 3 } y ^ { 4 } \right) ^ { - 3 } } { \left( y ^ { 4 } x ^ { - 5 } \right) ^ { - 4 } }$$

Simplify the expression. Assume that the variables in the denominator are nonzero.
- $$\frac { \left( x ^ { - 3 } y ^ { 4 } \right) ^ { - 3 } } { \left( y ^ { 4 } x ^ { - 5 } \right) ^ { - 4 } }$$

A) $\frac { x ^ { 11 } } { y ^ { 4 } }$
B) $\frac { y ^ { 4 } } { x ^ { 11 } }$
C) $\frac { y ^ { 4 } } { x ^ { 6 } }$
D) $\frac { x ^ { 6 } } { y ^ { 4 } }$

Correct Answer:

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