Answer: B
Explanation: the Tigris river was essential for trade and travel, the Tigris Euphrates river system was basically centered in Mesopotamia
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The </span>Egyptians invented<span> and used many simple machines, such as the ramp and the lever, to aid construction processes. They used rope trusses to stiffen the beam of ships. </span>Egyptian<span> paper, </span>made<span> from papyrus, and pottery </span>were<span> mass-</span>produced<span> and exported throughout the Mediterranean basin.</span>
The answer is The Bill of rights
