One Key Reason for the Federal Government to Regulate Banks

One key reason for the federal government to regulate banks is that

A) it will lose profit tax revenue if a bank fails.
B) taxpayers' money will be used to pay off losses in bank deposits if a bank fails.
C) it wants to ensure that people can borrow as much as they want.
D) it tries to protect domestic banks from foreign competition.
E) it tries to keep interest rates at low levels.