B is definitely correct as I recently did a lesson on it but I am not sure about the others, sorry.
Changes in the money supply affect people and businesses in a variety of ways. The size of the money supply can increase and decrease the cost of borrowing or the rate of interest thus making it easier or harder for businesses and individuals to borrow money. Also the size of the money supply or a nation's monetary policy can influence inflation and the growth of an economy which influences both individuals and businesses as well.
it tells you the answer if you go down below on the web
