Which one of the following is a correct statement about an iterator.

An iterator is an object that is associated with a collection. The iterator provides methods for fetching the elements of the collection, one at a time, in some order.

An iterator is an class that is associated with a collection. The iterator provides methods for fetching the elements of the collection, one at a time, in some order.

An iterator is an class that is associated with a collection. The iterator provides methods to process object of the collection, one at a time, in some order.

An iterator is an object that is associated with a collection. The iterator provides methods for executing the elements of the collection, one at a time, in some order.