I believe they were extending the revolution through the medium of anti slavery, the strongest Union principle.
The Nazis eventually ran out of food, supplies and lost most of their numbers because of the harsh winter conditions in the Soviet Union.
The increase in the trade of silver during the period between 1550 and 1800 is due to the fact that silver was started to be used as a standard currency for trade purposes. Even though it was not considered as "legal tender", as it would later be used for this purpose with the introduction "Bimetallism" in the 19th century, it was widely adopted as a tool for trade among the civilizations that existed at the time.
Option A is correct. Federal Reserve Board is responsible for regulating banks and setting interest loans, although the Federal Reserve plays a larger role in interest rates.
The Federal Reserve Board which is The Board of Governors of the Federal Reserve System is the main governing body of the Federal Reserve System. Its function is to oversee the Federal Reserve Banks and with helping implement the monetary policy of the United States. The Federal Reserve System is the central banking system of the United States of America.