The first keeps were rectangular in shape but later ones were often circular. The Stone Keep would be surrounded by a thick stone wall containing turrets for lookouts. The Bailey was now the area outside the keep but within the outer walls and shelter for animals or craft workshops might be built against the walls.
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4 is answer i think if wrong dont report me pls
The correct answer is D) Supplying Currency to banks
The Federal Reserve is in charge of monetary policy, meaning policy related to the money supply, rather than fiscal policy, such as government spending and tax collection. Monetary supply responsibilities involve determining what amount of currency to supply to banks, usually through the form of the interest rate.
the question and answer appear to be unrelated
Answer Marginal revenue is the amount of revenue one could gain from selling one additional unit. Marginal cost is the cost of selling one more unit. If marginal revenue were greater than marginal cost, then that would mean selling one more unit would bring in more revenue than it would cost.
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