Some historians use the term "robber baron" to describe industrialists such as Rockefeller, Carnegie, and Morgan, Which action by these men could be used as evidence to refute this stereotype?

The men were philanthropists who gave large sums of money to public projects.

Explanation:

The term Robber Baron was applied to a businessman who involved in immoral activities, under whom corporations like railroads, steel, and petroleum became monopolies, used corrupt political control, bribery, etc to earn enormous wealth. However, no one can deny the fact that these business tycoons helped to develop the nation and generated many employment opportunities for workers of the United States in the process.

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the answer is c, all the other options are things they are known for.

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