What Does It Mean, According to the Common Rule, for a Study

Multiple Choice

What does it mean, according to the Common Rule, for a study to involve "minimal risk"?

A) The level of distress a participant might experience is no greater than what may be encountered in daily life.
B) The odds are less than 1 in 10 that normal adults will experience discomfort from their participation.
C) The odds are less than 1 in 100 that normal adults will experience discomfort from their participation.
D) The odds are less than 1 in 100 that research participants will withdraw from the experiment because of the risk.