The average annual return over the period $1926-2021$ for the S&P $500$ is $12\mathrm{.}7\%,$ and the standard deviation of returns

is $21\mathrm{.}6\%.$ Based on these numbers, what is a $95\%$ confidence interval for $2022$ returns?

A$.-30\mathrm{.}5\%,55\mathrm{.}9\%$

B$.-10\mathrm{.}7\%,33\mathrm{.}5\%$

C$.-30\mathrm{.}5\%,78\mathrm{.}3\%$

D$.-1\mathrm{.}5\%,22\mathrm{.}4\%$