A principal of $$12,000$ is $3/5$th itself invested at $\backslash$times $\%$ interest rate for $5$ years. If the same principal was invested for $2$ years at an annual compound interest rate of $($x$+4)\%.$The interest return amount in dollars equalsO a$.$ $$4,147\mathrm{.}2$O b$.$ $$4,292\mathrm{.}3$O c$.$ $$4,219\mathrm{.}8$O d$.$ $$4,890\mathrm{.}4$