Simplify and Write with Positive Exponents Only $\frac { x ^ { - 2 } } { x ^ { - 6 } }$

Multiple Choice

Simplify and write with positive exponents only.
- $\frac { x ^ { - 2 } } { x ^ { - 6 } }$

A) $\frac { 1 } { \mathrm { x } _ { 12 } }$
B) $\frac { 1 } { \mathrm { x } ^ { 4 } }$
C) $x ^ { 4 }$
D) $x ^ { 8 }$