Math

   which of the following is rational but is not also an integer?     

   A. square root of 25           =  5              rational, and integer     

   B. cube root of 9                =  2.08 • • •   neither rational nor integer     

   C. square root of 0.64       =  0.8           rational, but not an integer     

   D. cube root of -8              =  –2            rational, and integer     

   _.