Graph the function y = x3 + 3x2 – x – 3. Which lists all of the turning points of the graph rounded to the nearest whole number?

(–3, 0) and (1, 0)
(–2, 3) and (0, –3)
(–2, 3), (–1, 0), and (0, –3)
(–3, 0), (–1, 0), and (1,0)