It Is ________ to Remove from Research the Possibility of Any

It is ________ to remove from research the possibility of any harm to a participant ________.

A) possible;because research can always be made to have mild effects
B) possible;and most research could still be easily done
C) impossible;because psychologists are often uncaring about participant well-being
D) impossible;because research occasionally involves some mild distress for participants
E) possible;because the context of the university setting generally enables the research to be done at another university where conditions are more amenable