Which of the following statements is not true? a) The system AX-bis inconsistent if and only if does not in the column space of A. b) The vector space spanned by ₁., is the column space of the matrix whose columns are ₁. c) if is an mxm elementary matrix and A is an mxn matrix, then the row space of EA is the same as the row space of A. d) The set of non-zero row vectors of a matrix A is a basis for the row space of A.