Factor the Trinomial $-$ 1 If Necessary) $$- 7 u ^ { 2 } + 42 u - 63$$

Multiple Choice

Factor the trinomial. Factor out any common monomials first (including $-$ 1 if necessary) . $$- 7 u ^ { 2 } + 42 u - 63$$

A) 7 ( u $-$ 3) ( u $-$ 3)
B) $-$ 7 ( u + 3) ( u $-$ 3)
C) 7 ( u $-$ 3) ( u + 3)
D) $-$ 7 ( u $-$ 3) ( u $-$ 3)
E) $-$ 7 ( u $-$ 3) ( u + 3)