An iterator is implemented for some containers in C++ to :

To change the address where data is stored in the container

To access individual elements of the container and to navigate through the container

To query the size of the container

Allow client class to access private variables of the container directly

A(n) ________ is an abstract data type that stores and retrieves items in a last-in-first-out manner.

In a Queue data structure, the function enqueue does the following:

		prints the content of the queue
		Inserts an element to the front of the queue
		Inserts the element at the end of the queue
		Inserts elements and sorts the queue in ascending order

		queue
		stack
		vector
		array
		None of the above