In which situation would it be acceptable to temporarily stress or deceive an experimental participant? the researchers need more participants, so they deceive potential participants by telling them the testing will take 10 minutes, rather than the full hour it will actually take. the research will embarrass the participants because there is no way to keep the information confidential. the researchers want to understand violent behavior, and they are concerned that full knowledge of the study would make the participants change their behavior during the experiment. the research would result in lasting harm, and the researchers do not want the participants to know about it ahead of time?