World War I officially ended with the signing<span> of the </span>Treaty of Versailles<span> on June 28, 1919. Negotiated among the Allied powers with little participation by Germany, its 15 parts and 440 articles reassigned German boundaries and assigned liability for reparations.</span>
Answer;
The new industrial unions were different from the older trade unions in that they were more focused on protecting workers from very dangerous conditions in the factories.
Explanation;
Industrial unions were organizations of skilled (craft workers) and unskilled (common laborers) workers within an industry.
<span>Industrial unions organized workers industry wide including unskilled with skilled workers rather than following strict craft lines like traditional unions. Many of the new industrial unions arose in the 1930's with the Congress of Industrial Organizations. </span>
c) spread of communism in America
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