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. a. no, because they had to wait for the interviews b. no, because they did not know the nature of the experiment before participating c. yes, because they agreed to participate in an experiment d. yes, because they are not forced to open the door e. unable to determine whether subjects consented to experiment