Answer:
A) Kristi can earn interest on her original deposit
Step-by-step explanation:
Banks obtain deposits from people who put their money in savings accounts. Banks reserve some of that money, and loan out the rest. That is the system under which all banks operate, and it is known as fractional-reserve banking, because only a fraction of deposits are kept as reserves, the rest is loaned.
Banks pay interest to depositors, and earn interest from borrowers. Banks are able to make a profit because they charge a higher interest rate to borrowers than the rate they pay to depositors.
In this example, Kristi is earning some interest from the bank because otherwise she would not have any incentive to deposit her money in a savings account, and the bank pays her interest because the bank needs her money to continue its business model.