Question

a major progressive business reform that president taft enacted was
strengthening labor unions.
decreasing tariffs.
strengthening weaker trusts.
breaking up large monopolies.

Explanation:

To solve this, we analyze each option:

• Strengthening labor unions: Taft's focus was more on business regulation, not labor union strengthening.
• Decreasing tariffs: Taft initially supported tariff reduction but the Payne - Aldrich Tariff was seen as a compromise and not a major progressive business reform in the sense of regulating business.
• Strengthening weaker trusts: Progressive era was about regulating and breaking monopolistic trusts, not strengthening them.
• Breaking up large monopolies: Taft was known for filing more antitrust suits (like against U.S. Steel) and breaking up large monopolistic trusts, which was a major progressive business reform.

Answer:

D. breaking up large monopolies.