Find the intervals on which fis increasing and decreasing. 2 f(x)= 2cos x on [1:,1|:] Select the correct choice below and, if necessary, ll in the answer box(es) within your choice. 0 A- The function is increasing on the open interval(s) D and decreasing on the open interval(s) |:| (Simplify your answers. Type your answers in interval notation. Type exact answers, using 1: as needed. Use a comma to separate answers as needed.) 0 B- The function is decreasing on the open interval(s) D The function is never increasing. (Simplify your answer. Type your answer in interval notation. Type exact answers, using 1: as needed. Use a comma to separate answers as needed.) 0 C. The function is increasing on the open interval(s) D. The function is never decreasing. (Simplify your answer. Type your answer in interval notation. Type exact answers, using I; as needed. Use a comma to separate answers as needed.) O D. The function is never increasing or decreasing