Based on the options provided, the action that had a long-lasting effect on the part of the Progressives but had the least immediate effect on South Carolina is probably "extending the suffrage of women." Although this was a significant achievement for women's rights and democracy in America, South Carolina didn't ratify the 19th Amendment granting women the right to vote until 1969, making it the last state to do so. It took time for the cultural and political norms of the state to shift, and even after the Amendment was passed, many women still faced obstacles in exercising their right to vote. In contrast, ending child labor, ending business trusts, and outlawing the use of alcohol all had more immediate and tangible impacts on the state and society at large.
The action that had a long-lasting effect on the part of the progressives but had the least immediate effect on South Carolina (SC) is option 4: extending the suffrage of women. While extending suffrage to women was an important goal of the progressive movement, it faced significant opposition and did not see immediate success in all regions, including South Carolina. However, in the long run, the women's suffrage movement gained momentum and eventually resulted in the 19th Amendment to the United States Constitution, which granted women the right to vote nationwide.
