The sum of the two 5-digit numbers AMC10 and AMC12 is 123422. What is A\plus{}M\plus{}C?
<spanclass=′latex−bold′>(A)</span>10<spanclass=′latex−bold′>(B)</span>11<spanclass=′latex−bold′>(C)</span>12<spanclass=′latex−bold′>(D)</span>13<spanclass=′latex−bold′>(E)</span>14