Rewrite the Rational Expression as an Equivalent Rational Expression with the Given

Multiple Choice

Rewrite the rational expression as an equivalent rational expression with the given denominator.
- $\frac { 9 } { 4 m } = \frac { } { 28 m }$

A) $\frac { 63 } { 28 m }$
B) $\frac { 4 } { 28 m }$
C) $\frac { 7 } { 28 m }$
D) $\frac { 9 } { 28 m }$