Which of the following would decrease the money supply M2 in Hong Kong?
A. Mr Au repays a HK$10 000 loan in cash to a licensed bank in Hong Kong.
B. Mr Bean withdraws HK$20 000 from a savings account with a licensed bank in Hong Kong and holds it as cash.
C. Mr Chan transfers HK$30 000 from his savings account to his current account with a licensed bank in Hong Kong.
D. Mr Ding withdraws HK$40 000 rom his time deposit in a restricted licence bank in Hong Kong and remits the money overseas.