Final answer:
The Progressive Era was the era that fixed the problems created throughout the Gilded Age by addressing various social and political challenges.
Step-by-step explanation:
The era that was most notable for fixing the problems created throughout the Gilded Age is b) The Progressive Era. The Progressive Era was a time of wide-ranging causes and varied movements, where activists and reformers from diverse backgrounds pursued their goals of a better America. This era focused on addressing challenges such as rapid urban sprawl, corruption, industrial working conditions, and women's rights, among others. It was characterized by grassroots efforts, investigative journalism, and reforms at both state and federal levels.