The correct answer is: Members passively accept work decisions
Rationale: Members of an effectively functioning group will take an active interest (as opposed to members passively accepting work decisions) in decisions affecting their work.
Disagreement and criticism within the group is healthy, particularly in avoiding problems that occur when groups seek consensus at all costs (eg 'group think'). 'There is competition with other groups' is healthy, as it unites and stimulates the group.
Individuals achieving their own targets can be a sign that the group is supporting the performance of its members - not just that they are focusing on their own performance at the expense of the group.
Pitfalls: If you were trying to go by 'common sense' instead of knowledge, you might think that intra-team disagreement and inter-team competition were negatives: not so. The examiner does not set 'trick' questions, but questions can be designed to separate those who have studied from those who are guessing!