Factor the Trinomial Completely $147 x ^ { 2 } + 336 x y + 192 y ^ { 2 }$

Multiple Choice

Factor the trinomial completely.
- $147 x ^ { 2 } + 336 x y + 192 y ^ { 2 }$

A) $3 ( 7 x - 8 y ) ^ { 2 }$
B) 3(7x + 8y) (7x - 8y)
C) $3 ( 7 x + 8 y ) ^ { 2 }$
D) prime