You Are Conducting Research to Better Understand Why So Many

You are conducting research to better understand why so many homeless teenagers participating in a transitional housing program eventually opt out and return to "living on the streets," with the goal of identifying the problem and generating ideas about possible solutions. You have decided to narrow your focus to teens who receive services at a local drop-in center for homeless youth and are either currently living in transitional housing or have left transitional housing in the past year. Which of the following would be the best gatekeeper for your research?

A) the staff person leading the activities at the drop-in center
B) a social worker who provides people referrals to the center
C) the director of the center
D) a relative of one of the teens