Carlos took 70% of a whole pie. Maria took one third of the remainder. What portion of the whole pie was left?<spanclass=′latex−bold′>(A)</span>10%<spanclass=′latex−bold′>(B)</span>15%<spanclass=′latex−bold′>(C)</span>20%<spanclass=′latex−bold′>(D)</span>30%<spanclass=′latex−bold′>(E)</span>35%