Byzantine empire i'm pretty sure
Printing press that's the answer <span />
Jimmy Carter is known to be an American politician as well as the 39th President of the United States. During his presidential campaign, he asked the Americans to cast their votes for him for the reason that he could restore that faith of the Americans in their government after the incident of Watergate scandal. The answer is option D.
It would be the oasis and aquifers provide water to the people. In the arid places people tend to supply by travelling around the desert and stopping in areas that has oasis and aquifers in order to replenish their water supplies. Also oasis and aquifers become stopping posts if it is a trade route for merchants and travelers in the arid regions.
