Suppose that in the coming year, you expect Rackspace Hosting$$s stock to have a standard deviation of $24\%$ and a beta of $2\mathrm{.}0,$ and SolarWinds$$ stock to have a standard deviation of $31\%$ and a beta of $1\mathrm{.}9.$ Which of the following statement is correct?

A$.$

Systematic risk is measured by beta, therefore, Rackspace Hosting$$s stock has more systematic risk.

B$.$

Total risk is measured by beta; therefore, Rackspace Hosting$$s stock has more total risk.

C$.$

Total risk is measured by standard deviation; therefore, Rackspace Hosting$$s stock has more total risk.

D$.$

Total risk is measured by beta; therefore, SolarWinds$$ stock has more total risk.