The Importance of the Investiture Conflict Was That It

The importance of the Investiture Conflict was that it:

A) formally,though not in practice,separated the "church" and the "state" in European politics.
B) signaled the decline of the papacy in western Europe.
C) created a lasting conceptual distinction between religion and politics in western Europe.
D) established the cult of the Virgin Mary in medieval Christianity.
E) represented the triumph of the Church over secular authority.