Factor Out the Greatest Common Factor $9 \mathrm {~m} ( 9 - \mathrm { m } ) + 5 \mathrm { n } ( 9 - \mathrm { m } )$

Multiple Choice

Factor out the greatest common factor. Simplify the factors, if possible.
- $9 \mathrm {~m} ( 9 - \mathrm { m } ) + 5 \mathrm { n } ( 9 - \mathrm { m } )$

A) $9 ( m + n ) ( 9 - m )$
B) $m ( 9 + 5 n ) ( 9 - m )$
C) $( 9 m + 5 n ) ( 9 - m )$
D) $( 9 m - 5 n ) ( 9 - m )$