Les Just Bought a Megaphone of Root Beer

Multiple Choice

Les 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." Les replies, "Hey, I bought it, and I am not going to waste one drop of it." Les's behavior could best be described by which of the following mental biases?

A) loss aversion
B) hyperopia
C) risk positioning
D) the sunk-cost fallacy