Complete the Following Arithmetic Problems $\begin{array}{c}5 \mathrm{~A} 8_{16} \\-\quad 9 \mathrm{D}_{16} \\\hline\end{array}$

Multiple Choice

Complete the following arithmetic problems.
- $\begin{array}{c}5 \mathrm{~A} 8_{16} \\-\quad 9 \mathrm{D}_{16} \\\hline\end{array}$

A) $645 _ { 16 }$
B) $50 \mathrm {~B} _ { 16 }$
C) $50 \mathrm { C } _ { 16 }$
D) $644 _ { 16 }$
E) None of these