Which statement best describes the Reformation?

A- It was a movement that questioned the authority and integrity of the Catholic Church and led to a split in the Christian religion

B- It was a crusade led by scientists studying the laws of nature to prove the existence of God through experimentation and observation

C- It was an attempt by scholars to improve education in Europe that unintentionally started a debate about human sinfulness

D- It was an effort by Christian bishops to reorganize the Catholic Church that resulted in wars between Christians and Muslims