The floor of a rectangular room is covered with square tiles. The room is 10 tiles long and 5 tiles wide. The number of tiles that touch the walls of the room is<spanclass=′latex−bold′>(A)</span>26<spanclass=′latex−bold′>(B)</span>30<spanclass=′latex−bold′>(C)</span>34<spanclass=′latex−bold′>(D)</span>46<spanclass=′latex−bold′>(E)</span>50