I. A is an n x n matrix, z R", and Ax = z has more than one solution. A. The linear transformation x B. The linear transformation x Ax is not surjective (not onto). ATx is injective (one-to-one). C. There is a non-zero matrix B such that BA is a zero matrix. D. The linear transformation x ATX is not surjective (not onto). E. The columns of AT are linearly independent II. A is ann x n matrix, z = R", and Ax = z has exactly one solution. A. If B is an n x n matrix such that BA = In then A commutes with B. B. The linear transformation x Ax is surjective (onto). C. The linear transformation x ATX is not injective (not one-to-one). D. The columns of A are linearly independent E. A2 has linearly dependent columns