An investor pays $$989\mathrm{.}40$ for a bond. The bond has an annual coupon rate of $4\mathrm{.}75\%.$ What is the current yield on this bond?

A$.4\mathrm{.}80\%$

B$.4\mathrm{.}85\%$

C$.9\mathrm{.}60\%$

D$.9\mathrm{.}70\%$