7. Which of the following statements about solids is false?
(A) The hexagonal closest-packed structure is ABAB....
(B) A body-centered cubic unit cell has four atoms per unit cell.
(C) For unit cells having the same edge length, a simple cubic structure would have a smaller density than abody-centered cube.
(D) Atoms in a solid consisting of only one element would have six nearest neighbors if the crystal structurewas a simple cubic array.
(E) All the statements are correct.