Find the critical values and determine the intervals where f(x) is increasing and the intervals where f(x) is decreasing for the function f(x) = 3x4 - 6x² +7. Select one: a.increasing on (-1,0), decreasing on (-∞o, -1) U (0, 1) b.increasing on (-∞, -1) U (0, 1), decreasing on (-1,0) U (1,00) c. increasing on (-∞o, -1), decreasing on (-1,0) U (1,00) d.increasing on (-1,0) U (1, oo), decreasing on (-00,-1) U (0, 1) e.increasing on (-∞, -1) U (0, 1), decreasing on (-1.0) 0000

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