The expected return on MSFT next year is $12\%$ with a standard deviation of $20\%.$ The expected return on AAPL next year is $24\%$ with a standard deviation of $30\%.$ If James makes equal investments in MSFT and AAPL, what is the expected return on his portfolio?

$$ A$.20\%$

B$.16\%$

C$.18\%\%$

D$.25\%$