According to Chaleff,followers need to have the ______ to support and to challenge the leader.

A) skills
B) intelligence
C) critical mass
D) courage

Chaleff emphasizes the importance of followers having the courage to both support and challenge their leader. This requires the ability to speak up when necessary and to take risks in the face of potential disagreement or criticism. While skills and intelligence may be important qualities for followers to possess, they are not specifically discussed in relation to the need to challenge the leader. Critical mass may refer to the number of followers needed to enact change, but again, this is not directly related to the need for courage in supporting and challenging the leader.