One possible way to simplify the trigonometric expression is shown. Choose the correct substitution in each of the steps below from the answer bank provided. Simplify: (secx- cos x). cotx - sin x Step 1: (secx- cos x). A. sin x Step 2: (secx- cos x). B Step 3: (C - cos x) Step 4: D Answer Bank: M. sinz COR N COS X where A = [Select] where B= [Select] where C = [Select] where D [Select]