Find a Polynomial of Degree 3 with Constant Coefficient $- 18$

Multiple Choice

Find a polynomial of degree 3 with constant coefficient $- 18$ and zeros $- 1$ , $- 2$ , and $3$

A) $3 x ^ { 3 } - 21 x - 18$
B) $x ^ { 3 } - 21 x ^ { 2 } - 18$
C) $3 x ^ { 3 } + 21 x + 18$
D) $3 x ^ { 3 } - x ^ { 2 } + 21 x - 18$
E) none