Add or Subtract as Indicated $\begin{array}{r}-7 z^{4}+5 z^{3} \\-z^{3}+13 z\end{array}$ A) $-7 z^{4}+6 z^{3}-13 z$

Multiple Choice

Add or subtract as indicated.
-Add
$\begin{array}{r}-7 z^{4}+5 z^{3} \\-z^{3}+13 z\end{array}$

A) $-7 z^{4}+6 z^{3}-13 z$
B) $-7 z^{4}+4 z^{3}+13 z$
C) $-7 z^{4}+6 z^{3}+13 z$
D) $-6 z^{4}+5 z^{3}-13 z$