Progressivism can be best described as:
1. A diverse group of individuals working for a wide variety of reform causes.
- Progressivism was not a unified movement with a specific list of reform objectives but rather a broad and diverse movement that encompassed various individuals and groups advocating for different social and political reforms.
While the other options in the question suggest a more unified and specific approach to progressivism, the most accurate description is that it was a movement with a range of participants working towards different reform causes based on their individual beliefs and goals.