At each step, we are changing the places of exactly two numbers from the sequence 1, 2, 3, 4, 5, 6, 7. How many different arrangements can be formed after two steps?<spanclass=′latex−bold′>(A)</span>88<spanclass=′latex−bold′>(B)</span>100<spanclass=′latex−bold′>(C)</span>120<spanclass=′latex−bold′>(D)</span>176<spanclass=′latex−bold′>(E)</span>441