What is the purpose of the following method?

public class StackEx

{

public static void undefined(LinkedStack s1, LinkedStack s2)

{

LinkedStack s3 = new LinkedStack( );

while(! s1.isEmpty())

s3.push(s1.pop());

while(! s2.isEmpty())

s1.push(s2.pop());

while(! s3.isEmpty())

s2.push(s3.pop());

}

}

	a.	Stack s1 will contain all elements of stack s2 in the reverse order and stack s2 will contain all elements of stack s1 in the original order.
	b.	Stack s1 will contain all elements of stack s2 in the reverse order and stack s2 will contain all elements of stack s1 also in the reverse order.
	c.	Stack s1 will contain all elements of stack s2 in the original order and stack s2 will contain all elements of stack s1 in the reverse order.
	d.	Stack s1 will contain all elements of stack s2 in the original order and stack s2 will contain all elements of stack s1 also in the original order.