Given P E p 0, 10]. Which of the following is not a refinement of P if P = {1, 5,6, 7, 10} A. P* = {1, 3/2, 7/2, 6, 17/2, 10} B. P* = {1, 7/2, 6, 7, 17/2, 10} C. P* = {1, 3/2, 7/2, 6, 17/2, 9,10} D. P* = {1, 15/4, 6, 17/2, 10} E. none of the above