I think its D: The Red Sea
B. The leader makes MOST decisions, eliminating god and president, and the people "follow" this leader most likely throwing out president and prime minister, leaving chief as the plausible explanation, as well as the fact that it's the Algonquin people.
historians believed that Hulagu's sudden retreat had been caused by the power dynamic having been changed by the death of the Great Khan Möngke on an expedition to the Song dynasty's China, which made Hulagu and other senior Mongols return home to decide his successor. so it would be because of a rullers death