What's the present value of a perpetuity that pays $$750$ per year if the appropriate interest rate is $10\%?$

a$.$ $$5,000\mathrm{.}00$

b$.$ $$6,000\mathrm{.}00$

c$.$ $$6,666\mathrm{.}67$

d$.$ $$7,500\mathrm{.}00$

e$.$ $$8,728\mathrm{.}50$