Because if their was an even number the votes could be tied.
The answers are:
<span>Some oil refineries in the area flooded, releasing toxic sludge into the water that covered much of the city.
The city's position between Lake Pontchartrain and the Mississippi River led to widespread flooding.</span>
America must extend commercial relations with Europe while insuring that the US has as little to do with European politics as possible. This is because if America gets too involved with European politics, then the US will lose more money in European wars that do not truly affect them.
<span>Significance: This was the first principle of American foreign policy. Peace, commerce, and honest friendship with all nations, entangling alliances with none.</span>