Which of the following was not part of the reforms introduced by Dodd-Frank in response to the financial crisis?

a) A Financial Stability Oversight Council was established and given authority to designate institutions as SIFIs.

b) SIFIs were subjected to additional regulation by the Federal Reserve

c) An Office of Credit Ratings was established within the SEC to supervise credit rating agencies.

d) Subprime mortgages were ruled as ineligible collateral for mortgage backed securities.

e) Bank investment in private equity was restricted.