Final answer:
Americans attempted to solve social problems through implementing new economic policies, establishing social welfare programs, enacting legal reforms and regulations, and engaging in progressive social movements.
Step-by-step explanation:
The Americans attempted to solve social problems of the late 19th and early 20th centuries through various means:
- Implementing new economic policies that regulated trusts and monopolies and ensured consumer safety.
- Establishing social welfare programs to provide a basic standard of living for Americans.
- Enacting legal reforms and regulations to improve public health and living conditions, abolish child labor, and provide insurance for workers.
- Engaging in progressive social movements led by reformers who sought government action and support through legislation and reforms.