What are four names given to Louisiana's most important river?

 List of rivers of Louisiana (U.S. state). Contents. 1 By drainage basin. 1.1 Gulf of Mexico. 1.1.1 East of the Mississippi; 1.1.2 Mississippi River. 1.1.2.1 Distributaries; 1.1.2.2 Tributaries; 1.1.2.3 Red River. 1.1.3 Gulf west of the Mississippi. 2 Alphabetically; 3 References; 4 See also ... USGS Geographic Names Information System; USGS Hydrologic Unit Map

Explanation: Have a good day

b) to encourage free trade

credit card number 4 is the right answer