Sean is a high school student who is angry much of the time. he often vents his anger by swearing at his teacher. one day his teacher decides to extinguish sean's swearing by ignoring him whenever he swears. yet over the next few weeks, sean continues to swear as frequently as he always has. three of the following are possible explanations why, from a behaviorist's perspective, the teacher's "extinction" strategy is not working. which alternative is the least likely explanation?