During the 1500s and 1600s germany was divided largely because of disagreements about what? a. religion b. languagec. war policyd. political systems

The answer would be A. Religion.
During the 1500s, a German professor-priest Martin Luther who in 1517 issued a challenge the church over this new interest in worldly affairs. He wanted the church to return to the pure (spiritual) ways of the early church--and back away from all this recent interest in power and wealth--which was rapidly corrupting it.