Trick Questions

I am now convinced that teachers of nursing school take a special course in how to develop trick questions to put on exams. I have never taken exams that have such ambiguous answers or as many correct choices in multiple choice questions where you have to choose the "most correct" answer. Geez...they are all right so they should count as correct, shouldn't they? They call this critical thinking in nursing but I am still convinced that it is just the teachers standing back and saying "nany nany boo boo" when all the students get more than 30% of the questions wrong. It sucks and I am really hoping that I can get the hang of it.