QUESTION 9 Use a graphing utility to estimate the local extrema of the following function. f(x) = x4 + 2x3 - 12x2-10x + 4 O A. local max ( -2, 9) local min (-5.25, -37) and (7.1, -28) O B. local max ( - .5, 6) local min (-3.25, -47) and (2.1, -32) O C. local max ( - 3.5, -47) local min (2.1, -32) O D. local max ( 6, -1) local min (2.1, -32)