The set of all 22 matrices is a vector​ space, under the usual operations of addition of matrices and multiplication by real scalars. Determine if the set H of all matrices of the form is a subspace of . Choose the correct answer below. A. The set H is a subspace of because ​Span{H}. B. The set H is not a subspace of because the product of two matrices in H is not in H. C. The set H is not a subspace of because H does not contain the zero vector of . D. The set H is a subspace of because H contains the zero vector of ​, H is closed under vector​ addition, and H is closed under multiplication by scalars. E. The set H is not a subspace of because H is not closed under vector addition. F. The set H is not a subspace of because H is not closed under multiplication by scalars.