Which of the following directly contributes to the performance of important group tasks?

A) Task activities
B) Assignment mandates
C) Directive activities
D) Responsibility activities
E) Maintenance activities

Task activities directly contribute to the performance of important group tasks by focusing on the task at hand and working towards achieving the shared goals of the group. Assignment mandates, directive activities, responsibility activities, and maintenance activities all indirectly support the group's performance by facilitating communication, motivation, accountability, and cohesion among group members.