Find Iany critical numbers for the function f(x) = (x+6)10 and then use the second-derivative test to decide whether the critical numbers lead to relative maxima or relative minima. If the second-derivative test gives no information, use the first-derivative test instead. Find any critical numbers for the function f(x) = (x+6)10. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. OA. The critical number(s) of f(x) is/are x = (Use a comma to separate answers as needed.) B. There are no critical numbers. Decide whether the critical numbers lead to relative maxima or relative minima. Select the correct choice below. A. There is a relative maximum at the critical number. B. There is a relative minimum at the critical number. C. There is neither a relative maximum nor a relative minimum at the critical number. D. It cannot be determined if the critical number leads to a relative maxima or minima.