Use the Difference of Squares Pattern to Factor the Polynomial $x ^ { 2 } - 49$

Multiple Choice

Use the difference of squares pattern to factor the polynomial. $x ^ { 2 } - 49$

A) ( x $-$ 7) ( x + 7)
B) ( x $-$ 49) ( x + 49)
C) ( x + 7) ( x + 49)
D) ( x $-$ 7) ( x $-$ 49)
E) none of these