Which of the following accurately describes a difference between the church in the West and the church in the East between 500 and 1400?

The church in the West believed the Pope was the universal authority, while the church in the East gave authority to a government leader.
The church in the West conducted services in Greek, while the church in the East used Latin
Priests could marry in the West, and in the East they were required to remain celibate
The church in the West debated icons while the church in the East never had a problem with them.