How Should a Completed and Signed Informed Consent Form Be

How should a completed and signed informed consent form be handled?

A) It is turned over to the agency's institutional review board ( IRB ) for safekeeping.
B) It is sent to the National Institutes of Health Office of Research Integrity to demonstrate compliance.
C) It is filed in the researcher's office in a locked filing cabinet, separate from any details or data generated by the study.
D) It is copied ( carbon acceptable ) , with one copy given to the participant and the other held by the researcher.