Fiedler's Contingency Model of Leadership Has Made an Important and Lasting

Fiedler's contingency model of leadership has made an important and lasting contribution to the study of leadership because it:

A) is the only leadership theory to adopt a contingency approach.
B) was the first theory to recognize the existence of leadership substitutes.
C) suggests that leaders tend to rely mainly on one style that is most consistent with their personality and values.
D) discovered that effective leaders do not have a common set of competencies.
E) is the only theory to adopt the implicit leadership perspective.