Which statement is true？（）

• A、The equals method does NOT properly override the Object.equals method.
• B、Compilation fails because the private attribute p.name cannot be accessed in line 5.
• C、To work correctly with hash-based data structures， this class must also implement the hashCode method.
• D、When adding Person objects to a java.util.Set collection， the equals method in line 4 will prevent duplicates.