Ans: D
The required interest
The required interest
$\begin{array}{cl}
= & \$50~000\times(1+\dfrac{8\%}{12})^{12} – \$50~000 \\
= & \$4~149.975~34 \\
= & \$4~150 \text{, correct to the nearest dollar.}
\end{array}$
