A square's area is equal to the perimeter of a 15 by 17 rectangle. What is this square's perimeter?<spanclass=′latex−bold′>(A)</span>20<spanclass=′latex−bold′>(B)</span>32<spanclass=′latex−bold′>(C)</span>36<spanclass=′latex−bold′>(D)</span>40<spanclass=′latex−bold′>(E)</span>56