TabSubjectDifficultyStructuretpo4-1animal behaviorhellishparalleltpo8-1animal behaviornormaltpo7-3anthropologyeasytpo1-3archaeologynormaldichotomy/comparisontpo14-4archaeologynormalparalleltpo11-2architectureeasyparalleltpo1-1artnormaldichotomy/comparisontpo16-4art historynormaltpo17-1art historynormalparalleltpo18-2art historynormaldichotomy/comparisontpo8-2art historyeasytpo5-2astronomyhellishparalleltpo13-4astronomyhellishtpo14-3astronomynormaltpo18-1astronomynormaltpo3-4astronomyeasytpo19-2astronomyeasytpo2-4astronomyabnormaltpo18-4biologyhellishtpo7-2biologynormaltpo11-1biologynormaltpo12-1biologynormaltpo14-2biologynormaltpo16-3biologynormaltpo17-4biologynormalparalleltpo1-4biologyeasytpo6-2biologyeasytpo2-2botanyeasytpo11-4businessextremely easytpo12-2businessextremely easytpo5-3che