Factor F(x) into Linear Factors Given That K Is a Zero

Multiple Choice

Factor f(x) into linear factors given that k is a zero of f(x) .
- $$f ( x ) = x ^ { 3 } - 3 x ^ { 2 } - 49 x + 147 ; k = 7$$

A) $x ( x - 7 ) ( x - 3 )$
B) $( x - 7 ) ( x - 3 ) ( x + 3 )$
C) $( x - 7 ) ( x - 3 ) ( x + 7 )$
D) $( x - 7 ) ( x + 3 ) ( x + 7 )$