Consider the following parametric equation. a. Eliminate the parameter to obtain an equation in x and y. b. Describe the curve and indicate the positive orientation. X= - 3 cos 2t, y = - 3 sin 2t; Ostsx a. Eliminate the parameter to obtain an equation in x and y. OA. x2 + y2 =9 OB. ( X + 3)2 + (y + 3)2=9 O C. - 9 cos 22x + - 9 sin 22y = 3 OD. (X - 3)2 + (y -3)2=9 b. Describe the curve and indicate the positive orientation. It is