Dave, a graduate student, has difficulty talking to groups. unfortunately, he has chosen a career in which he must speak to large groups of people. the night before a presentation he tosses and turns, and the resulting lack of sleep makes the situation worse. when he makes a presentation, he often becomes confused and stumbles over his words. as a result, he feels worthless and miserable. which two criteria of abnormal behavior are most useful in analyzing this case? (1 point)