Why was the investiture controversy important.
A- It removed power from the king and increased the power of the nobles.
B- It created a conflict that divided the empire into two.
C- It allowed the pope to unify the kingdoms of Europe.
D- It helped establish the idea of separate areas of power for the church and state.

it helped establish the idea of separate areas of power for the church and state

Explanation:

operation overlord was the codename for the battle of normandy, the allied operation that launched the successful invasion of german-occupied western europe during world war ii. the operation was launched on 6 june 1944 with the normandy landings

the answer is )multiethnic