Final answer:
True, team members agreeing on their purpose and direction contributes to increased team cohesion, which in turn can improve decision-making, communication, and performance.
Step-by-step explanation:
If team members agree on purpose and direction, they will be more cohesive. The answer to this question is a. True. When team members share an understanding of their common purpose and the direction in which they are headed, it can lead to a stronger sense of unity and commitment within the group. This increased cohesion can result in more efficient decision-making, better communication, and improved overall team performance.
Addressing parts of the other questions provided for context: Collective dilemmas often arise when team members have conflicting goals or methods of achieving them. The team halo effect, mentioned in one of the other questions, can cause teams to appear more effective than they actually are. Additionally, the majority rule can indeed fail to produce a desirable outcome when multiple choices are present, as stated in another question.