Which curve has the greater length on the interval [- 1,1], y = 1-x or y = cos (x/2)? Select the correct choice below and fill in the answer boxes to complete your choice. (Round to three decimal places as needed.) 2 A. The curve of y = 1 - x has a length of unit(s). The curve of y = cos (x/2) has a length of Therefore, y = cos (x/2) has the greater length on the interval [ - 1,1]. B. The curve of y = 1 - x has a length of unit(s). unit(s). The curve of y = cos (x/2) has a length of unit(s). Therefore, y = 1-x has the greater length on the interval [ - 1,1].