The right answer is d) Region D.
Based on the map, the best option, that better represents the region of the current day Iran is letter D. The Safavid dynasty ruled one of the greatest Iranian empires, from 1501 until its end in 1736. The conquest started by the founder of the dynasty, Ismail. They were responsible for the spread of a more orthodox Imami version of the Shia faith, which they forced among their predominantly Sunni subjects with the help of Imami scholars from Lebanon and the Gulf coast.