Recall the Application About the Attempt to Form a Salt

Recall the Application about the attempt to form a salt cartel in the 19th century to answer the following question(s) .
-Recall the Application. One reason cited for the failure of the salt cartel was

A) the demand for salt sharply declined in the late 19th century.
B) new firms entering the market and underpricing the cartel.
C) foreign competition taking over the salt market.
D) the federal government's banning of price fixing in the salt market.