Assume the following method is within the SingleLinkedList class. What does it do? public void unknownMethod() { Node pt = tail; E temp; while (pt != null && pt.prev != null) { temp = pt.data; pt.data = pt.prev.data; pt.prev.data= temp3; pt = pt.prev; } } a. Exchanges the data of the first node with the data of the last node. O b. Makes the data of the second node to move to be the data of the last node. OC. Makes the data of the last node to move to become the data of the first node. O d. Exchanges the data of the first two nodes.

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