The answer to this is A.korea
Rosetta Stone, think of the modern language course
Every year, railroads save consumers billions of dollars while reducing energy consumption and pollution, lowering greenhouse gas emissions, cutting highway gridlock and reducing the high costs to taxpayers of highway construction and maintenance. Freight railroads mean more jobs and a stronger economy.
Popular vote is the amount of votes that exist nationwide and that can get cast during a voting process. In some countries it represents the number of electors while in some it represents the general population that has come of age and has voting rights. In history the number of voters was much lower since not everyone was a part of the popular vote.
I read a book series on this subject and I'm pretty sure its D. All of the above. Because many African Americans were indeed looking for job opportunities instead of being slaves and working on plantations, would face rarely any harsh racism there, and well the government didn't exactly help but there was many operations aiding the move.