The correct answer is B) Balance listening and speaking.
The piece of advice would be best for participants in a group discussion to follow in order to promote collaboration is "Balance listening and speaking."
Good communication promotes collaboration, generates understanding and minimizes misunderstandings in the workplace. One good piece of advice to promote collaboration between employees and the employer is to balance listening and speaking, so people can feel the confidence to raise their hand and freely express their opinions and concerns. To understand, we need to listen and comprehend what is the issue of each employee. So listening is as important as speaking in the communication process.