Consider the graph of f(x) =9cos(4x) over one period: 0, NIN . Which of the following are true about the key points on its graph? A) Max Point: (0,9) , Min Point: (,-9), X-intercepts: (50 ) and .0 B) Max Point: 9 Min Point: 8 , -9 , X-intercepts: (0,0) and -,0 4 C) Max Point: (0,9) , Min Point: (7,-9), X-intercepts: (50) and 2 D) Max Point: (0,9) , Min Point: , X-intercepts: 20 | and E) None of these