Match Each of the Following Procedures That Is Used to Protect

Match each of the following procedures that is used to protect research participants with the appropriate example of that procedure.
-Assess the risk-benefit ratio.

A) Asking, "Would you like to stop now?"
B) Telling participants at the outset who will have access to the data.
C) Explaining to participants that their behavior during the study was not unusual.
D) Sending an informed-consent letter.
E) Doing a literature review to determine whether the proposed treatment has unanticipated side effects.