4. Which of the following statememts about Arbitrage Pricing Theory (APT) is FALSE? and explain why. (A) The CAPM yields an equation equivalent to one-factor APT with the factor being the stock market index. (B) The factors in the APT must be yield curve slope, level of interest rates, level of exchange rates, real GDP, and inflation. (C) A portfolio with no exposure to any APT risk factors should earn the risk-free rate on average. (D) The APT can be used to estimate the cost of capital for a firm