Which of the following statements is CORRECT?

	a.	Once a portfolio has about 5 stocks, adding additional stocks will not reduce its risk by even a small amount.
	b.	It is impossible to have a situation where the market risk of a single stock is less than that of a portfolio that includes the stock. Once a portfolio has about 5 stocks, adding additional stocks will not reduce its risk by even a small amount.
	c.	An investor can eliminate virtually all market risk if he or she holds a very large and well diversified portfolio of stocks.
	d.	An investor can eliminate virtually all diversifiable risk if he or she holds a very large, well-diversified portfolio of st