Julio just bought a megaphone of root beer. As he drinks from the giant cup, he eventually becomes full. One of his friend's comments, "If you don't stop drinking that stuff, you will get sick." Julio replies, "Hey, I bought it, and I am not going to waste one drop of it." Julio's behavior best illustrates __________.
O hyperopia
O the sunk-cost fallacy
O loss aversion
O risk positioning