Find the shape of the queue in the lines with "Queue".

queue intQueue; intQueue.push(18); intQueue.push(2); intQueue.push(intQueue.front()); // Queue: _________ intQueue.pop(); intQueue.push(intQueue.front()); // Queue: _________ intQueue.pop(); intQueue.pop(); // Queue: __________

Please choose one:

a.

Queue: 2 2 18 Queue: 2 18 2 Queue: 2

b.

Queue: 18 2 18 Queue: 18 2 2 Queue: 2

c.

Queue: 18 2 18 Queue: 2 2 18 Queue: 2

d.

Queue: 18 2 18 Queue: 2 18 2 Queue: 2