Which of the following investment options will maximize your future wealth at the end of $17$ years? Assume any funds that remain invested will earn a

nominal rate of $8\%$ compounded monthly.

$($a$)$ Deposit $$3,900$ now.

$($b$)$ Deposit $$95$ at the end of each month for the first $6$ years.

$($c$)$ Deposit $$65$ at the end of each month for $17$ years.

$($d$)$ Deposit a lump sum in the amount of $$7,800$ at the end of year $6.$