Teenagers signed up to be subjects in a psychology experiment. When they arrive, they are told that interviews are running late, and they are left waiting outside. The experimenters have placed a sign next to the entry door that says, "do not open the door under any circumstances. " some subjects are outside alone and others are in pairs; these are the treatments being compared. Will the subject open the door? the teenagers agreed to take part in an unspecified experiment, and the true nature of the experiment is explained to them afterward. Does this meet the requirement of informed consent? explain.