PLEASE HELP MEE!! How was Egypt’s economy different from Mesopotamia’s economy?

Egypt had a barter system.
Egypt had a command economy.
Egypt did not use enslaved workers.
Egypt did not have a system of measurement.

Compared to the Mesopotamia's economy, Egypt tended to differ. Egypt's geography granted a boost in the economy with the proposal of many crops. Alternatively, the Mesopotamian economy, at times, struggled with their economy since its geography lacked healthy soil and unpredictable geography. Mesopotamians depended on the Tigris and Euphrates Rivers, however, they sometimes brought floods.

martians or other types of aliens represent a unique fear as opposed to zombies. vampires and other types of monsters.   in most sci-fi stories, aliens come from other worlds and have different or more advanced technology.   abductions and experimentation on human bodies that involve these technologies, or the use of these technologies against human beings and the use of unknown "powers", are a type of fear that's different from that of other types of monsters.  

answer: c

explanation: