Sometimes to Best Answer a Research Question, the Investigator Would

Sometimes to best answer a research question, the investigator would have to ask children to participate in a potentially harmful situation.In this situation, what would ethical guidelines suggest?

A) Because of the possible benefits to humankind of the knowledge obtained, the researcher should go ahead with the project.
B) As long as the children consent to participate, and the research design is a field experiment, the researcher can proceed.
C) As long as the researcher adequately debriefs subjects after the project, and the research design is microgenetic, the researcher can proceed.
D) Other means of obtaining the information should be found or the research abandoned.