How did pope innocent iii assert the power of the church?

a. he stated that the pope was second only to god.
b. he authorized the concordat of worms.
c. he allied himself with the albigensians against phillip ii.
d. he challenged efforts to reform the church's courts

The correct answer is A, he stated that the pope was second only to God.

Explanation:

Pope Innocent III was one of the most important popes of the Middle Ages. He was elected in the late 12th century and was mainly known for his efforts to reinforce and enhance the church's domains throughout Europe's kingdoms. He set himself above kings and had a leading role in many ecclesiastical reforms. He allied himself with Phillip II of France against the Albigensians in a crusade.

The Concordat of Worms was before his regime, it took place in the early 12th century.