$1-10.$ A loan of $$600$ for $4$ years is made at the interest rate of $i^{(2)}=\mathrm{.}04($nominal rate. compounded semiannually$)$

If a single payment of discount is to be deducted at the beginnning, what is the amount of the discount?

$($ $$600$ is repaid in $4$ years.$)$

$($A$)$ $$40$ to $$50$

$($B$)$ $$50$ to $$75$

$($C$)$ $$75$ to $$85$

$($D$)$ $$85$ to $$100$

$($D$)$ $$100$ to $$110$