I believe the answer is: B.migrant workers.
At that time, the migrant workers was forced to live under a horrible condition since there was no laws that regulate company's treatment toward of its employees. Due to the plight of these workers, united farm workers was created in order to create better situation for the migrant workers.
The correct answer is:
government intervention is needed to guarantee that Americans will support the war.
a European intellectual movement of the late 17th and 18th centuries emphasizing reason and individualism rather than tradition. It was heavily influenced by 17th-century philosophers such as Descartes, Locke, and Newton, and its prominent exponents include Kant, Goethe, Voltaire, Rousseau, and Adam Smith.