Final answer:
The statement that uses the economists' definition of money is B) Betsy is rich—she has a lot of money.
Step-by-step explanation:
The statement that uses the economists' definition of money is B) Betsy is rich—she has a lot of money.
Economists define money as a medium of exchange that is widely accepted in transactions for goods and services. In this statement, the word 'money' is being used in the context of wealth or financial assets, which aligns with the economists' definition.