"Indifference or hostility" describes the attitudes that most Progressives held about minorities and immigrants.
Answer: Option C
Step-by-step explanation:
During 1890s to 1920s the political reformation and social activism took place across the United States and known as "progressive era". The progressive era raised many problems due to progress and developments took place in United States like industrialization, political corruption, immigration and urbanization.
Progressives were generally very supportive of the poor people, labor groups and minorities as they had faith in creating programs and finding solutions to enable them to have a good life style and standards to that of the more privileged classes of society.