Which of the Following Statements Is/are Correct

Multiple Choice

Which of the following statements is/are correct?

A) If a market is weak form efficient it is also semi- and strong form efficient
B) If a market is semi-strong efficient it is also strong form efficient
C) If a market is strong form efficient it is also semi-strong but not weak form efficient
D) If a market is strong form efficient it is also semi- and weak form efficient