Suppose a fund is believer of market efficiency, what products the fund should offer to their clients? Suppose we live in a Fama-French three-factor model world. A. Only large stock portfolio B. Only small or value portfolios C. Only S&P 500 D. Only large or growth portfolios E. Only risk-free assets F. All kinds of diversified portfolio of stocks including small stock portfolio, large stock portfolio, value portfolio, growth