Prior to beginning any study, Professor Clark's research team carefully explains the research to potential participants, answers questions, and helps them to determine if the study is right for them. Professor Clark and his team are showing respect for participants' ______.

A) integrity
B) autonomy
C) beneficence
D) justice

By explaining the study and helping potential participants to determine if it is right for them, Professor Clark and his team are showing respect for participants' autonomy, or their ability to make informed decisions about their participation. Respect for integrity pertains to avoiding deception and protecting confidential information, beneficence relates to maximizing participants' benefits and minimizing their risks, and justice concerns the fair distribution of benefits and burdens of the research. While these other principles may also be important in research, the scenario described primarily emphasizes autonomy.