The function r(t) = 2i+9 cos (t)j +9 sin(t) k traces out A. A circle of radius 1 and center (2,9,9) in the plane x = 2. B. A circle of radius 9 and center (2,9,9) in the plane x+y+z = 20. C. A circle of radius 9 and center (2,0,0) in the plane x = 2. D. A circle of radius 3 and center (2,0,0) in the plane x = 2. E. A circle of radius 3 and center (2,9,9) in the plane x + y + z = 20.