Answer: The answer is indeed the first option: taking advantage of people to save money.
Step-by-step explanation:
According to the excerpt, the fast food industry does not hire teenagers with the purpose of offering them high quality training or of helping society. Teenagers are hired because, since they have little or no training and experience, they turn out to be a cheaper and more controllable workforce. That means restaurants save money by paying lower wages, and also make sure their employees will not trouble them by demanding better conditions since such inexperienced employees don't know any better.