Tim Raitt Says: "We All Agree That Effective Leadership Is

Tim Raitt says: "We all agree that effective leadership is important, but that doesn't tell us how to make sure that the people we put in leadership positions are actually leaders. In my view, the most effective way to accomplish this goal is to identify the characteristics of effective leaders and make sure that the people in leadership positions have those qualities." Bonnie Haffior responds by saying: "You're on the right track, but effective leadership is less an issue of the characteristics that effective leaders have and more of an issue of what effective leaders do. If we can learn the most effective leadership behaviours, then we can identify future leaders and improve the performance of those currently in leadership positions."
J.C. Kahn-Tinn chimes in: "Your theories would be wonderful if they worked, but in reality they don't. People who are effective leaders in one context can be ineffective in another. Leadership approaches are not simply right or wrong. The most effective approach is to consider the context of the situation and then identify the leadership approach that is most appropriate to that situation."
Based on the descriptions above, Tim Raitt and J. C. Kahn-Tinn would most likely disagree about the answer to which of the following questions?

A) Is effective leadership essential for strong business performance?
B) Are there any characteristics that many effective leaders have in common?
C) Could having a personality type be an advantage in one leadership context and a disadvantage in another?
D) What is the most appropriate definition of "effective leadership"?
E) What percentage of leaders are effective leaders?