The correct answer is D. Mehmed II
Step-by-step explanation:
Mehmed II was a ruler in the Ottoman Empire from 1444 to 1446 and from 1451 to 1481. As a ruler he was mainly known for conquering different places, this includes the fact the conquested Constantinople and Anatolia which made the Ottoman Empire powerful.
Besides this, different from most rulers Mehmed II allowed religious freedom and diversity in the empire. Indeed, Mehmed II believed as long as subjects were obedient they could follow the religion they wanted and workship in different churches, temples or monasteries. This freedom was established through the Ahdname of Milodraz in 1463. Thus, it was Mehmedd I the ruler that promoted diversity in the Ottoman Empire.