Please help me with these multiple choice questions.

3. The set of all instances of a subclass is a subset of the instances of its superclass.

A. Ture B. False

6. If a data field is declared in the superclass, you may hide it by redeclaring it in the subclass.

A. True B. False

10.

public class Test { public static void main (string[] args) { String s = newString("Welcome to Java"); Object o = s; String d = (String)o;

}

}

A. s, o, and d reference the same String object. B. When casting o to s in String d = (String)o, the contents of o is changed. C. When assigning s to o in Object o = s, a new object is created. D.When casting o to s in String d = (String)o, a new object is created.