The returns on the common stock of Tesla are quite cyclical. In a boom economy, the stock is expected to return $30$ percent in comparison to $10$ percent in a normal economy and a negative $28$ percent in a recessionary period. The probability of a recession is $30$ percent while the probability of a boom is $35$ percent. What is the standard deviation of the returns on this stock? Select the choice that is closest to your answer.

A$)23\mathrm{.}53\%$

B$)23\mathrm{.}84\%$

C$)24\mathrm{.}19\%$

D$)24\mathrm{.}42\%$