Let $x, y, z$ be (non-zero) vectors and suppose $w = 5x-15y-3z$.

If $z= x-3y$, then $w =$ $x+$ $y$.

Using the calculation above, mark the statements below that must be true.

A. Span(w, x) = Span(w, x, y)
B. Span(w, x, z) = Span(x, z)
C. Span(w, z) = Span(x, y, z)
D. Span(w, x) = Span(w, z)
E. Span(w, y, z) = Span(y, z)