@Override
public T removeFront() {
  T front = getFront();

  firstNode = firstNode.getNext();

  if(firstNode == null) {
  	lastNode = null;
  } else {
  	firstNode.setPrev(null);
  }

  return front;
}

Which of the following will NOT happen if removeFront() is called on a deque with 1 item?

• firstNode and lastNode will become null
• firstNode.data will be returned
• lastNode.data will be returned