All of the Following Means Were Used to Reduce Problems

All of the following means were used to reduce problems associated with the circulation of commercial bank notes except

A) a pledge by the Treasury to accept all bank notes issued by state-chartered banks.
B) anticounterfeiting associations formed by commercial banks.
C) bank note reporters and counterfeit detectors, such as Thompson's Reporter and Hodges' Bank Note Safeguard .
D) note brokers who bought and sold commercial bank notes.