What might indicate that not all members are fully committed to the group's objectives?

The correct answer highlights that when there are variable commitment levels among group members, it can indicate a lack of full commitment to the group's objectives. This variability often manifests as some individuals exhibiting enthusiasm and dedication to achieving the goals, while others may be disengaged or indifferent. This disparity can lead to reduced effectiveness in the group's efforts, as those with lower commitment may not contribute equally, causing friction or a lack of cooperation.

In contrast, uniform participation suggests that all members are involved and engaged, which typically reflects a shared commitment to the group's goals. Similarly, strong group cohesion points to a high level of unity and commitment among members, which enhances collective efforts toward achieving objectives. A lack of understanding of roles can create confusion and hinder performance, but it does not directly indicate commitment levels; members may still be committed even if they are unclear about their specific responsibilities.