I just encountered this question while applying at a hospital. It is a horrible question, because getting "very upset" is completely unprofessional. But, in healthcare, rules are there for a reason... The most important being patient safety and privacy. Even something as benign as sending a text could be misinterpreted as a potential HIPPA violation. Answer A, "Get very upset and say something", is the only answer where any correct action is taken, and that is to say something. No hospital wants to think that an employee is going to turn a blind on the safety of their patients by "letting it go" or because the action may not "affect you". And definitely getting "very angry and saying nothing" makes you sound like a loaded gun. If somebody breaks a rule, they want to know that the right thing will be done.