A cashier gives one person a five dollar bill and 15 one dollar bills in exchange for a $20 bill. He gives a second person a $10 bill a five dollar bill and 51 dollar bills in exchange for a $20 bill which characteristic of money does this illustrate

A durability
B Portability
C Divisibility
D Uniformity

C Divisibility

This scenario illustrates the characteristic of divisibility, as the cashier is able to provide different denominations of bills to make change for the $20 bill. The ability to divide money into smaller units allows for more flexibility in transactions.