A therapist is facilitating a new support group for adults. The primary goal is to foster a sense of equality, encourage open communication, and ensure all members feel like active participants. The therapist is considering three potential seating arrangements for the room:

1. Theater Style: All chairs are arranged in rows facing the therapist at the front of the room.
2. Circle Style: All chairs are arranged in a circle, facing inward.
3. Boardroom Style: Chairs are arranged around a large rectangular table.

Based on the stated goals for the group, which seating arrangement is most effective? Justify your choice by explaining why it best supports the group's objectives and why the other two options are less suitable.