Use the Quotient Rule to Simplify the Expression $\frac { 63 m ^ { 20 } n ^ { 11 } } { 7 m ^ { 19 } n ^ { 6 } }$

Multiple Choice

Use the quotient rule to simplify the expression.
- $\frac { 63 m ^ { 20 } n ^ { 11 } } { 7 m ^ { 19 } n ^ { 6 } }$

A) $63 \mathrm { mn } ^ { 5 }$
B) $9 m ^ { 39 } n ^ { 17 }$
C) $9 n ^ { 5 }$
D) $9 \mathrm { mn } ^ { 5 }$