4) If, during a deposit expansion, not all money gets redeposited into the banking system and some leaks out ' as currency, then the real world...

I don't understand this question, could you please provide me some explanation? thanks

2.4) If, during a deposit expansion, not all money gets redeposited into the banking system and some leaks out' as currency, then the real world multiplier is .A) larger than 1/Rd. B) not related to C) equal to 1/Rd. D) smaller thanI 1/1251; - “Rd.