The function f(x) has a continuous second derivative, and it satisfies f(-9) = -1, f'(-9) = 0 and f"(-9) = 0. What can be concluded? O f(x) has a local minimum at x = -9. f(x) has a local maximum at x = -9. f(x) has neither a local minimum nor a local maximum at x = -9. O none of these

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