If the digit 1 is placed after a two digit number whose tens' digit is t, and units' digit is u, the new number is:<spanclass=′latex−bold′>(A)</span>10t+u+1<spanclass=′latex−bold′>(B)</span>100t+10u+1<spanclass=′latex−bold′>(C)</span>100t+10u+1<spanclass=′latex−bold′>(D)</span>t+u+1<spanclass=′latex−bold′>(E)</span>None of these answers