Which of the following statements about commercial banks is TRUE?

Which of the following statements about commercial banks is TRUE?

A. State banks are regulated by the Comptroller of the Currency.

B. All state banks are required to be members of the Federal Reserve System.

C. Commercial banks are allowed to invest in junk bonds.

D. Banks that are insured by the Federal Deposit Insurance Corporation (FDIC) are also regulated by the FDIC.