Considering the situation, a classical economist who sees great merit in the quantity theory of money would look for the amount of money in circulation to explain this rise in inflation.
This is because the Quantity theory of money is a theory that claims that money supply determines the price level in an economy.
This theory states that the higher the quantity of money supply, the higher the price level of commodities translates to inflation and vice versa.
Thus, in this case, as an economist who believed in the Quantity theory of money, such a person would look into the quantity of money in circulation.
Hence, in this case, it is concluded that the correct answer is "amount of money in circulation."
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