Find the Sum of the Polynomials $\begin{array} { r } x ^ { 4 } + 9 x ^ { 3 } + 5 x + 7 \\8 x ^ { 3 } - 2 x - 7\\\hline\end{array}$

Multiple Choice

Find the sum of the polynomials. $\begin{array} { r } x ^ { 4 } + 9 x ^ { 3 } + 5 x + 7 \\8 x ^ { 3 } - 2 x - 7\\\hline\end{array}$

A) $x ^ { 4 } + 17 x ^ { 3 } + 3 x$
B) $17 x ^ { 3 } + 3 x$
C) $17 x ^ { 6 } + x ^ { 4 } + 3 x ^ { 2 }$
D) $x ^ { 4 } + 17 x ^ { 3 } + 3 x + 14$
E) $17 x ^ { 6 } + x ^ { 4 } + 3 x ^ { 2 } - 14$