Answer:
Informational
Step-by-step explanation:
Based on the information provided within the question it can be said that the type of influence that the reference group is exhibiting is Informational Influence. This term refers to when a group discussion provides new information or discussions which allow the members of that group to develop new beliefs, attitudes or behavior towards the subject(s) in question. Which in this scenario the information provided by the other group members helped Jamarcus develop his behavior/attitude for these meetings.