Factor the Trinomial Completely $x ^ { 2 } - x - 63$

Multiple Choice

Factor the trinomial completely. If the polynomial cannot be factored, write "prime."
- $x ^ { 2 } - x - 63$

A) (x - 63) (x + 1)
B) (x - 7) (x + 9)
C) (x + 7) (x - 9)
D) prime