<h2><em>ANSWER/</em><em>:</em></h2>
- <em>B</em><em>.</em><em> </em><em>Guardians </em><em>of </em><em>the </em><em>church</em>
<em>#</em><em>C</em><em>a</em><em>r</em><em>r</em><em>y</em><em>O</em><em>n</em><em>L</em><em>e</em><em>a</em><em>r</em><em>n</em><em>i</em><em>n</em><em>g</em>
Usually it is the invasions and communism
C. Acueducts.
I'm sure that's it, good luck ;)
I don't believe i see a clear answer, but Mesopotamian believed that the priest could speak with the gods that is why they had the authority. "If you do this the gods will be please" "If you don't a donations the gods will be angry" blah blah blah - Mesopotamian priests
Emperor Quin Shi Huang had all the walls joined to one, making the great Wall of china