The graph of f(x) is shown. The graph starts at the bottom left, continues up through the x axis at negative three to a maximum around y equals three, goes back down through the x axis at negative one to a minimum around y equals negative one, and goes back up through the x axis at one.
For what values of x does f(x) = 0?
−1, 1, 2
−2, −1, 1
−3, −1, 1
−1, 1, 3