Final answer:
Economic inequality, muckraking journalism, and the expansion of democracy were the main factors that contributed to the demand for reform during the Progressive Era.
Step-by-step explanation:
The demand for reform during the Progressive Era was driven by several factors. One of the main factors was economic inequality and the growing gap between the rich and poor. As industrialization and urbanization led to rapid economic growth, many people were left behind and faced poor working conditions and low wages. This led to a desire for reforms to address social and economic inequality.Another contributing factor was the campaigns of muckraking journalists, who exposed social inequality and corruption. Their work brought these issues to the public's attention and encouraged Americans to take action.Lastly, the expansion of democracy and the belief that Americans needed more control over their government played a role in the demand for reform. Progressives sought to reform the democratic process and give more power to the people.