10. Which of the following can be most reasonably ADDED to the Fama and French three factor model as additional factors'? A. Market risk premium B. earning yield. i.e. the outperformance of low earnings-to-price ratio versus high earnings-to- price ratio companies C. firm size, i.e. the outperformance of small versus big companies D. momentum, i.e. the outperformance of high prior return portfolios versus low prior return portfolios E. covariance of returns with GDP growth