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7. The graph of g'(x), the derivative of a function g(x), is shown at right. Which of the following statements is/are y = 8'(x) true? I. The graph of g(x) has horizontal tangent line when x = 3. II. The graph of g(x) is decreasing on the interval from (-00, -2). 1 2 4 III. The graph of g(x) is increasing when x = -4. 4 -3 -2 -1 -2 A. I and III B. I only C. II only D. I and