Which of the following is an example of "cash flow?"
A) After paying her expenses and debts each month, Aileen has $1,000 left over.
B) Phoebe and Dexter have $4,500 in the bank after deducting their total outstanding loans and debts from their assets.
C) Bill has $3,200 in the bank after deducting his total outstanding loans and debts from his assets.
D) After paying her expenses and debts each month, Hanna has $225 left over.