If f (x) = (x-4)²(x + 2), then which only one of the following statements is true ?
A) f (x) is decreasing if x < 0
B) f (x) is increasing for 0 < x < 4
C) f (x) has a relative maximum at x = 0
D) The graph of f (x) has a horizontal tangent at x = 2
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Answer: Option C is correct
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