Two of the three sides of a triangle are 20 and 15. Which of the following numbers is not a possible perimeter of the triangle?<spanclass=′latex−bold′>(A)</span>52<spanclass=′latex−bold′>(B)</span>57<spanclass=′latex−bold′>(C)</span>62<spanclass=′latex−bold′>(D)</span>67<spanclass=′latex−bold′>(E)</span>72