Which of the Following Factors Was Used by Fama and French

Which of the following factors was used by Fama and French in their multi-factor model?

A) Return on the market index
B) Excess return of small stocks over large stocks
C) Excess return of high book-to-market stocks over low book-to-market stocks
D) All of these factors were included in their model.
E) None of these factors were included in their model.