Factor the Perfect Square Trinomial Completely $48 x ^ { 2 } - 168 x y + 147 y ^ { 2 }$

Multiple Choice

Factor the perfect square trinomial completely.
- $48 x ^ { 2 } - 168 x y + 147 y ^ { 2 }$

A) $3 ( 4 x - 7 y ) ( 4 x + 7 y )$
B) $3 ( 4 x + 7 y ) ^ { 2 }$
C) $3 ( 4 x - 7 y ) ^ { 2 }$
D) prime