Factor the Polynomial Completely $x ^ { 2 } + 5 x y - 14 y ^ { 2 }$

Multiple Choice

Factor the polynomial completely. If the polynomial cannot be factored, write "prime."
- $x ^ { 2 } + 5 x y - 14 y ^ { 2 }$

A) $( x - 7 y ) ( x + y )$
B) prime
C) $( x + 7 y ) ( x - 2 y )$
D) $( x - 7 y ) ( x + 2 y )$