Interview question

A developer makes a copy of a large object consisting of different objects. Instead of deep cloning, the developer is advised to use serialization and modifies every class to implement a serializable interface. On reaching a singleton class, the following code is shown: ``` //start of class private static WindowManager objectWindow = new WindowManager (); private WindowManager () { } public static WindowgetInstance() { return objectWindow(); } //end of class code ``` Which statement is correct about this singleton class? A. Multiple instances of this class cannot be created in serialization. B. The given code is correct for serialization. C. A singleton class cannot implement serialization. D. readResolve() should be implemented to implement the serializable interface.