If Possible, Factor the Polynomial Completely $$a ^ { 2 } x ^ { 2 } - 1$$

Multiple Choice

If possible, factor the polynomial completely. If a polynomial cannot be factored, state that it is prime.
- $$a ^ { 2 } x ^ { 2 } - 1$$

A) $( a x + 1 ) ( a x - 1 )$
B) $( a x - 1 ) ^ { 2 }$
C) $( a x + 1 ) ^ { 2 }$
D) $a ^ { 2 } x ^ { 2 } - 1$