Determine the location and value of the absolute extreme values of f on the given interval, if they exist. f(x) = -2 sec x; 4' 4 Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice. (Type exact answers, using it as needed. Use a comma to separate answers as needed.) O A. The absolute minimum is at x = and the absolute maximum is at x = O B. The absolute maximum is at x = but there is no absolute minimum. O C. The absolute minimum is at x = , but there is no absolute maximum. OD. There are no absolute extreme values for f(x) on - . 4