Question: The following method is added to our DLinkedList class. What is the purpose of this mystery ( ) method? Question 2 0 Select one: Swap

The following method is added to our DLinkedList class. What is the purpose of this mystery() method?
Question 20Select one:
Swap the head and the tail nodes, so that the last node becomes the first node and the first node becomes the last node.
Move the first node to the tail of the list.
Reverse the order of all nodes in the linked list.
Move the last node to the head of the list.

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