B.
Slaves came from Africa.
Religion teachings could be an answer but "B" would make more sense. Also, books came from printing presses... A "manufactured good."
The Mexican war led to the capture of Arizona, New Mexico, Texas, and a part of California. Hope this helps.
Since you provide no options, That could be considered an economic Benefit. Using require materials will lead to using less money for the expenditure, which later on could be allocated to fund a more important/pressing matter such as welfare.
hope this helps
They were put onto ships.