The line joining the midpoints of the diagonals of a trapezoid has length 3. If the longer base is 97, then the shorter base is:
<spanclass=′latex−bold′>(A)</span>94<spanclass=′latex−bold′>(B)</span>92<spanclass=′latex−bold′>(C)</span>91<spanclass=′latex−bold′>(D)</span>90<spanclass=′latex−bold′>(E)</span>89