Answer:
a. There was a lot of conflict between the Sunni and Shi'ite Muslims.
Step-by-step explanation:
The Ottoman and Safavid empires were both muslim, but the Ottoman empire was sunni while the Safavid empire was Shiite. This caused conflict between the two empires along with fighting over territory, considering they bordered each other, so they went into a war called the Battle of Chaldiran. The Safavids lost the war due to lack of gunpowder technology.