Which of the following statements is 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.