An investor owns $750$ shares of stock which has a hedge ratio of $0\mathrm{.}9.$ How many call options will the investor need to hedge the position for every $100$ shares of stock owned?

a$.$

$8\mathrm{.}33$

b$.$

$7\mathrm{.}5$

c$.$

$67\mathrm{.}5$

d$.$

$9\mathrm{.}0$