Which of the following was not one of the effects of the cotton boom?

U. S. trade increased with France and Spain.

Northern manufacturing expanded.

The need for slave labor grew.

Port cities like New Orleans expanded.

U. S. trade increased with France and Spain.

Explanation:

The cotton boom was the effect of the invention of the cotton gin, the cotton gin made work faster and better, which made cotton a lot more profitable, this led to farmers to produce only cotton. With this, many settler went to the South, this increased slavery in the South and increased the textile industry in the north.