A portfolio's expected return is 12%, its standard deviation is 20%, and the risk-free rate is 4%. Which of the following would make for the greatest...

A portfolio's expected return is 12%, its standard deviation is 20%, and the risk-free rate is 4%.Which of the following would make for the greatest increase in the portfolio's Sharpe ratio? (Select all that apply.)*An increase of 1% in expected return. *A decrease of 1% in the risk-free rate. *A decrease of 1% in its standard deviation.

A portfolio's expected return is 12%, its standard deviation is 20%, and the risk-free rate is4%. Which of the following would make for the greatest increase in the portfolio's Sharpe ratio?...