Let be a matrix with linearly independent columns.
Select the best statement. A. The equation always has a solution for all . B. The equation never has a solution for all . C. The equation has a solution for all precisely when it is a square matrix. D. The equation has a solution for all precisely when it has more columns than rows. E. The equation has a solution for all precisely when it has more rows than columns. F. There is no easy way to tell if has a solution for all . G. none of the above