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Answer (A) is correct . The capital asset pricing model adds the risk-free rate to the product of the market risk premium and the beta coefficient. The market risk premium is the amount above the risk-free rate (approximated by the U.S. Treasury bond yield) that must be paid to induce investment in the market. The beta coefficient of an individual stock is the correlation between the price volatility of the stock market as a whole and the price volatility of the individual stock.

Answer (B) is incorrect because The price-earnings ratio is not a component of the model.
Answer (C) is incorrect because The price-earnings ratio is not a component of the model.
Answer (D) is incorrect because The dividend payout ratio is not a component of the model.