Who was Theodore Roosevelt and what was the most important thing he did during the progressive era

Politicians and government officials. President Theodore Roosevelt was a leader of the Progressive movement, and he championed his "Square Deal" domestic policies, promising the average citizen fairness, breaking of trusts, regulation of railroads, and pure food and drugs.

Explanation:

definitely a for sure. ill see and update if i get the answer

i believe it is the second one.   if correct plz mark brainliest.