Final answer:
The relationship between labor and management changed substantially post-World War I from a government-mediated cooperation to a period of heightened conflict characterized by strikes and labor disputes. The correct answer is option b) Labor and management relations worsened after the war.
Step-by-step explanation:
The relationship between labor and management after World War I was quite different than it had been during the war. During World War I, the United States government worked to prevent strikes and labor disputes in order to maintain productivity for the war effort. This led to cooperative relations to some extent, as labor received some improvements in working conditions and the federal government supported workers' rights to organize and bargain collectively.
After the war, however, the cooperation seen during wartime did not last, and tensions between labor and management intensified. The postwar period saw a series of violent clashes, indicating increased frustration among workers over poor working conditions, low wages, and the high cost of living, particularly in the face of rising business profits during the war years.
Management, meanwhile, was wary of giving in to labor demands, fearing the potential of labor strikes to lead to broader social unrest, as had been seen with the Russian Revolution.
In summary, while the relationship between labor and management during World War I was characterized by a somewhat forced cooperation due to government intervention and a no-strike pledge by labor unions, the postwar period saw a deterioration in relations, with strikes and confrontations becoming common as each side's wariness of the other and differing goals came to the forefront.