Factor the Trinomial, If Possible $108 m ^ { 2 } + 252 m n + 147 n ^ { 2 }$

Multiple Choice

Factor the trinomial, if possible.
- $108 m ^ { 2 } + 252 m n + 147 n ^ { 2 }$

A) $3 ( 6 m + 7 n ) ^ { 2 }$
B) $( 18 m - 3 n ) ^ { 2 }$
C) $3 ( 6 m - 7 n ) ^ { 2 }$
D) $( 18 m + 21 n ) ^ { 2 }$