What is the variance for a stock that has had annual returns over the last four years of $7\%,12\%,18\%,$ and $11\%?$ This is a sample not a population.

A$.0\mathrm{.}21$

B$.4\mathrm{.}55$

C$.10\mathrm{.}26$

D$.12\mathrm{.}57$

E$.13\mathrm{.}40$