Consider an APT world with one systematic risk: market risk. The market portfolio has an expected return of 8% and risk-free interest rate is 2%. A financial analyst estimates the following characteristics for a well-diversified Portfolio A. Assume that the analyst is correct. Which of the following constitutes an arbitrage (a zero-cost portfolio) strategy? Short sell Market portfolio, buy A, borrow at the risk-free rate. Short sell A, buy Market portfolio, borrow at the risk-free rate. Short sell A, buy Market portfolio, invest in the risk free asset. Short sell Market portfolio, buy A, invest in the risk free asset. Short sell market portfolio, buy A