Which of the following statements about the risk-return trade off is true?

	a.	Portfolio A dominates portfolio B if porfolio A has a higher expected return than portfolio B.
	b.	If an investor is risk netural, the investment attractiveness increases with expected return and decreases with risk.
	c.	Portfolio A dominates portfolio B if porfolio A has a smaller variance than portfolio B.
	d.	Sharpe ratio measures the risk premium for one unit of systematic risk.
	e.	Assuming the return is normally distributed with a postive mean and variance, the probability of an investment loss is smaller in the long run.