Answer:
Group decision making
Explanation:
In group decision making, the different members of the group can share a larger pool of knowledge because two or more people tend to know more things that one (it's not always the case, but it's most often the case).
A group of people also offers diverse perspectives because each person sees the world differently.
Finally, when a group is involved in making a decision, the commitment to that decision can be deeper because more people feel responsible for it.