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 semistrong- and strong-form efficient.
B) If a market is semistrong-form efficient, it is also strong-form efficient.
C) If a market is strong-form efficient, it is also semistrong- but not weak-form efficient.
D) If a market is strong-form efficient, it is also semistrong- and weak-form efficient.