In the Context of Intergroup Relations, a Leader's Effectiveness Can

In the context of intergroup relations, a leader's effectiveness can often be thwarted or compromised due to:

A) having too many people to manage.
B) being perceived as an outgroup leader to some subgroups.
C) engaging in decision making that is vulnerable to group polarisation.
D) giving inadequate attention to the aspirations and emotional needs of group members.