According to research findings about influence tactics, which one is NOT true? a) According to the Fiedler leadership model, task-oriented leaders are more beneficial under moderate (vs. extreme) situations b) Exercising servant leadership can increase leaders' role overload especially when leaders take all the burden to provide care and support for others c) Exercising servant leadership can be depleting for leaders themselves especially when they are not good at taking perspectives of others. d) Leaders who frequently listen to follower complaints (i.e., receipt of venting) can experience more negative emotions at work