Answer:
A. To keep banks with falling asset values solvent.
Explanation:
When a bank is failing it will result in loss of funds not only for the bank but also for customers that have accounts in these banks.
If a bank eventually closes operations as a result of insolvency, they will not be able to pay off the customers. That is where the deposit insurance comes in to settle customers.
The government will have to spend a lot of money reimbursing customers their money.
To avoid this the federal government ensures the capital of banks is maintained to keep banks with falling asset values solvent.