The correct answer is "People have free will."
Based on the given scenario, Mike has the free will to do what wants, because of his desperation to get money, he decided to grab the elderly woman's purse in hopes of getting money and buying food with it. This shows that people has the free will to do whatever they want, yet the authority or the law is your limitation, if they see your actions to be illegal or out-of-hand, you will be punished.