marble i think since they build a few temples for the gods with marble but normal people would build with mud idk if it can be called cement.
Shi Huangdi was an effective leader because he was the first Chinese emperor that managed to unite the northern China and responsible to the first development of China's great wall.
Not only that, he is also the one that introduces China to the usage of money as a medium of transaction.
Answer:
Reliable
Fox is relevant, but lies a lot.
blood letting can help, but ends with
death most of the time (ancient)
and an unusual source can be correct, but a reliable source is more often so.
The answer B :they tend to be lower
