Which of the Following Is True

Which of the following is true?

A) ​A majority of U.S.money, whether M1 or M2, is in the form of legal tender.
B) ​If a bank lends out its excess reserves of $90,000, at the time the loan is made, the money supply will increase by $90,000.
C) ​Reserve requirements exist primarily to eliminate bank runs.
D) ​When there are two forms of money available, people prefer to spend the form of money that is more valuable.