The best action for Nelson to be a good participant is: He should take notes as others are speaking and then find a good time to speak up.
This approach allows him to engage with the discussion actively while still feeling comfortable. Taking notes helps him organize his thoughts and responses, which can make it easier for him to contribute when he's ready. Additionally, it shows that he is paying attention to what others are saying, which is an important aspect of being a good participant in a group discussion.