Two natural numbers, p and q, do not end in zero. The product of any pair, p and q, is a power of 10
(that is, 10,100,1000,10000 , ...). If p>q, the last digit of p–q cannot be<spanclass=′latex−bold′>(A)</span>1<spanclass=′latex−bold′>(B)</span>3<spanclass=′latex−bold′>(C)</span>5<spanclass=′latex−bold′>(D)</span>7<spanclass=′latex−bold′>(E)</span>9