Which statement about portfolio diversification is correct?

	A.	Proper diversification can reduce or eliminate systematic risk.
	B.	Diversification reduces the portfolios expected return because it reduces a portfolios total risk.
	C.	As more securities are added to a portfolio, total risk typically would be expected to fall at a decreasing rate.
	D.	The risk-reducing benefits of diversification do not occur meaningfully until at least 30 individual securities are included in the portfolio.