A total of 28 handshakes was exchanged at the conclusion of a party. Assuming that each participant was equally polite toward all the others, the number of people present was:
<spanclass=′latex−bold′>(A)</span>14<spanclass=′latex−bold′>(B)</span>28<spanclass=′latex−bold′>(C)</span>56<spanclass=′latex−bold′>(D)</span>8<spanclass=′latex−bold′>(E)</span>7