What is the largest number of solid 2-in×2-in×1-in blocks that can fit in a 3-in×2-in×3-in box?<spanclass=′latex−bold′>(A)</span>3<spanclass=′latex−bold′>(B)</span>4<spanclass=′latex−bold′>(C)</span>5<spanclass=′latex−bold′>(D)</span>6<spanclass=′latex−bold′>(E)</span>7