Find the x-values of all points where the function has any relative extrema. Find the value(s) of any relative extrema. f(x)=-x3+3x2+9x-1 W Select the correct choice below and, if necessary, ll in any answer boxes within your choice. 0 A- There are no relative maxima. The function has a relative minimum of D at x = C]. (Use a comma to separate answers as needed.) l l L l . l - C) B- The function has a relative minimum of D at x = D and a relative maximum/of D at x = D. ; (Use a comma to separate answers as needed.) 3 ' ' . i' O c- There are no relative minima. The function has a relative maximum of D at x =.[:l. \\ f (Use a comma to separate answers as needed.) C) D. There are no relative extrema. \\