The Qin dynasty built the Great Wall of China
I think it's because slavery costs less...just a guess.
The correct answer is A. Technological advances such as s<em>team power, air brakes, automatica lubricators and steel tracks</em> have affected the railroads very positively, since it has made it possible that the rail network could become a safer, more efficient and more reliable means of transportation for goods.
Answer:
secretary of defense. thaddeus stevens
Explanation:
Legislative referendum: the governing body alludes a bit of enactment to the general population to either endorse or dismiss it by vote. Mandatory submission – Typically new constitutions must be submitted to the general population for endorsement before they are viewed as sanctioned.
Popular Referendum : The general population may challenge a law as of late go by the lawmaking body. In the event that enough marks are assembled, the law will be put to a vote by the general population who may vote to invalidate the law
