Contingent behavior is most likely to explain: the effects of fashion. the results of chain letters. why pollution occurs. the problem of the commons. Choose the most correct answer by clicking a button, or by typing a letter from the keyboard and pressing the tab key. Jack will study for the big test if at least one other does. Jill will not study. Mary will study. Tom will study if at least two others do. Sue will study if at least three others do. The number studying will be: Choose the most correct answer by clicking a button, or by typing a letter from the keyboard and pressing the tab key.