The focus during the working phase of group development is on:​

A) ​initiation and introductions.
B) ​achieving members' goals.
C) ​balancing positive and negative feedback.
D) ​completing unfinished business.

The working phase of group development is focused on achieving members' goals. This is the stage where the group starts to work together to achieve their common purpose or objectives. They share information, ideas, and opinions with one another and collaborate to find solutions to problems. It's important to establish clear communication, trust, and respect during this phase to ensure the success of the group's efforts.