I think
D. <span>Once Constantine accepted Christianity, the Roman Empire became the center of the new faith's growth.
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A reason for the early success of the knights of labor was they allowed both skilled and unskilled workers to join.
They did not move west or south, according to my knowledge
Well that would likely hinder the trade for such nation, like China. China has a TON of industry, and what would happen of it couldn't reach outside its borders? The economy would plummet! It would weaken every aspect of the nation.
Answer:
On each primary date from March to June, one state from each of six regions votes
Explanation: