Members of an Interest Group Spend Most of Their Time

Members of an interest group spend most of their time arguing with one another. They have great ideas but accomplish little because everyone wants to work on their own ideas and not collaborate with others. What is the BEST advice you could give the group?

A) Add more members so there are more people to do the work.
B) Recruit people with different backgrounds so there is an array of viewpoints.
C) Disband this interest group because the goal is too controversial.
D) Make the group smaller so communication flows better.