(Choose 1 answer)
Specify the correct implementation of dequeue() method of a queue. This queue uses java.util.LinkedList for storing data and the head of the list is treated as the head of the queue. (Choose the most suitable one)
A. Object dequeue(){ if (isEmpty()) return(null);return(pool.removeFirst());}
B. void dequeue(Object x){ if (isEmpty()) return(null);pool.remove(pool.size()-1);}
C. Object dequeue(){if (isEmpty()) return;return(pool.remove(pool.size()-1));}
D. Object dequeue(){ if (isEmpty()) return(null);return(pool.removeLast());}
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