Which of the following is an example of the barter system?(1 point)

An Italian restaurant exchanges some of its food for a few pizzas from a nearby chain restaurant so that each set of employees can have something different for lunch.

An Italian restaurant prices its food so low that it no longer makes a profit in an attempt to drive a nearby pizza chain restaurant out of business. That way, it can raise its prices back up after the pizza chain is gone.

An Italian restaurant purchases pizzas to be delivered by a nearby chain restaurant so that its employees can have something different for lunch.

An Italian restaurant hires a new waitress and pays her a wage of $15 per hour.