Answer
D.
Work Step by Step
A. may not be true because a zero at $x=-3$ does not mean that $x=3$ is also a zero.
B. may not be true because we do not have information on the y-intercept. C. may not be true because a zero at $x=-3$ does not mean that $x-3$ is a factor of $f(x)$.
D. must be true because a zero at $x=-3$ also means that the function value at this point is zero.
