Final answer:
Both Franklin Roosevelt's New Deal and the Progressive Era shared the idea that the government has a responsibility to protect the well-being of its citizens, through regulations and programs like the FDIC, SEC, and Social Security.
Step-by-step explanation:
The core idea that both Franklin Roosevelt's New Deal and policies from the Progressive Era shared was D. the government has a responsibility to protect the well-being of its citizens. This is evident in the reforms and regulations that were implemented during these periods to ensure economic stability and social welfare. The government took active measures such as regulating the banking industry, creating the Federal Deposit Insurance Corporation (FDIC), and establishing programs like the Social Security Administration and the Security and Exchange Commission (SEC). These actions underscored a commitment to safeguard citizens’ interests and prevent future economic disasters. Critics argue the extent of this involvement, but the essence of government responsibility for citizen well-being was a common thread between the Progressive Era and the New Deal.