As the Participants for Your Focus Group Begin to Arrive

As the participants for your focus group begin to arrive, you notice that two of the participants seem to already be casual acquaintances. What is the best seating arrangement?

A) seat them next to one another so that they feel comfortable
B) seat them directly across from one another, so they are less inclined to speak to one another
C) seat them a few people away from one another so that they have a hard time making eye contact or whispering to each other
D) none of these--ask one to leave so it doesn't matter where they sit