The Learning From Experience feature: Boeing's Development of Teams and Their Leaders,illustrates all of the following about effective teams except:

A) individual performance by committed and competent individuals is crucial
B) individuals working separately can often achieve more than if they work as a team
C) team leaders make a difference in the functioning of teams
D) all of these are illustrated by the feature

The Learning From Experience feature emphasizes the importance of effective teamwork and the role of team leaders in facilitating team functioning. It also highlights the importance of individual performance by committed and competent individuals. However, it does not suggest that individuals working separately can often achieve more than if they work as a team. In fact, the feature emphasizes the importance of collaboration and communication among team members. Therefore, option B is not illustrated by this feature.