Under a gold standard, if the market price of gold is above the official price of gold (set by the monetary authority), people will be more likely to sell gold , which will cause the money supply to and the price level to .

answerup to (3) three years;

credit history is used by lenders to determine whether you are a 'risky' person to give their money to.

having a short history provide very little data for the lenders. they wouldn't be able to determine your credit behavior from such a small samples. even if they are perfect.

having long credit history with few blemishes provide larger and more accurate data for the lenders to predict your credit behavior.