答案：D
所求的利息
所求的利息
$\begin{array}{cl}
= & \$50~000\times(1+\dfrac{8\%}{12})^{12} – \$50~000 \\
= & \$4~149.975~34 \\
= & \$4~150 \text{，準確至最接近的元。}
\end{array}$
