Simplify the Expression $$\left( \frac { x ^ { - 1 } } { y ^ { - 4 } } \right) ^ { - 3 }$$

Simplify the expression. Express final result without using zero or negative integers as exponents. $$\left( \frac { x ^ { - 1 } } { y ^ { - 4 } } \right) ^ { - 3 }$$

A) $\frac { x ^ { 3 } } { y ^ { 12 } }$
B) $\frac { y ^ { 7 } } { x ^ { 4 } }$
C) $\frac { x ^ { 4 } } { y ^ { 12 } }$
D) $\frac { y ^ { 12 } } { x ^ { 3 } }$
E) $\frac { x ^ { 4 } } { y ^ { 7 } }$

Correct Answer:

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