Find the open intervals where the function is concave upward or concave downward. Find any inflection points.
A. Concave upward on (-?, -1) and (1, ?); concave downward on (-1, 1); inflection points at (-3, -5), (0, -1), and (2, -2)
B. Concave upward on (-?, -1) and (2, ?); concave downward on (-1, 2); inflection point at (0, -1)
C. Concave upward on (-?, -1) and (1, ?); concave downward on (-1, 1); inflection points at (-1, -3) and (1, -2)
D. Concave upward on (-?, -3) and (2, ?); concave downward on (-3, 2); inflection points at (-1, -3) and (1, -2)
Answer: C
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C. 
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A. 
B. 
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D. 