Which of the following characterizes the dual banking system in the United States?

Bank notes and checking accounts are financial products offered by banks rather than characteristics of the banking system itself. While these instruments are used in banking transactions, they do not define the structural framework of the dual banking system. Thus, they do not represent the fundamental characteristics that differentiate state and national banks.

Demand deposits and savings deposits are types of accounts held by customers in banks, but they do not pertain to the regulatory structure of the banking system. These account types reflect consumer behavior and banking services rather than the distinction between state-chartered and national-chartered banks inherent in the dual banking system.

The United States Mint and government bonds relate to the production of currency and government financing, respectively, but they do not characterize the banking system itself. These entities are involved in monetary policy and fiscal operations rather than the structural features of banking that define the dual system.