Use the map below that shows the extent of Islamic territory under different leaders to answer the following question: This is a map focusing in on the regions of North Africa, Arabia, and Persia. Different regions are numbered from I to IV. Region I covers the western side of the Arabian Peninsula only. Region II covers region one, plus the entire eastern side of the Arabian Peninsula. Region III covers regions one and two, but also includes the Fertile Crescent and most of Egypt. Region IV covers the first three regions, plus the North African coast to the west of Egypt and most of the Persian empire to the north and east of the Fertile Crescent. © 2012 Bontenbal Creative Commons, Attribution-Share Alike 3.0 Unported Each number on the map corresponds to the territory gained under a particular Islamic leader. Which of the following does region IV on the map represent? Expansion under Constantine I Lands inhabited by Christians during Muhammad's time Expansion during the Umayyad Caliphate Expansion under Charles Martel