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.

a.   it resulted in widespread unemployment.

alliances in ww1 were different from ww2 because the entente in ww1 made up of serbia,russia,france,britan,japan and italy later america  and all allied in a sort of balance of power and too keep germany,austria-hungary,and the ottomans down. russia allied the serbians in order to exert its influence in the balkans while france allied the russians because france was still in dismay and insulted after the defeat to the germans during the unification of germany and britian allied the belgians after the germans invasion of belgium.in ww2 the alliances were in a preemptive attempt to deter any further wars into happening while germany and italy allied since they were insulted and humiliated after the previous war while also sharing a similar ideology of facsim along with japan which all 3 had a want for world domination and agreed to assist one another in the endevours 

explanation: