Factor the Trinomial Completely $3 a ^ { 2 } b ^ { 2 } + 9 a b + 1$

Multiple Choice

Factor the trinomial completely.
- $3 a ^ { 2 } b ^ { 2 } + 9 a b + 1$

A) 3(ab + 1) (ab + 3)
B) $3 \left( a ^ { 2 } b ^ { 2 } + 3 a b + 1 \right)$
C) (3ab + 1) (ab + 3)
D) prime