16 16 a Let u= and v= Show that is in Span {u, v} for all a and c. C How is a system determined as consistent? O A. Solve for the variables after setting the equations equal to 0. O B. A system is consistent if there are no solutions. C. A system is consistent if there is one solution or infinitely many solutions. O D. A system is consistent only if all of the variables equal each other. Row reduce the augmented matrix to its reduced echelon form. 16 16 a -1 1 c