Industrialization and/or Urbanization. We now have technology fields, and higher paying job fields, that seem more interesting or grabs the younger generations attention.
I’m not sure if this will help you, but here!
“It’ been a decade, we have fought and fought for rights, but quite a place can be so cruel, who knew? It’s quite the drop in respect and sympathy for women. I’d say our nation is seperated and unfair, one shall be taught respect for us. We shall fight back with all might and strength. We shall treated as such man is. It is tiring, being woman, and takes such bravery. We suffer nights, days, evenings, just for our rights. We shall gain the respect we need, we are fighting for. I don’t know how long this shall last, but may we fight as long as needed.”
... because they opposed the United States becoming a member of the League of Nations.
The League of Nations was the signature idea of President Woodrow Wilson, point #14 of his 14 Points, an international peacekeeping association which he recommended for post-war settlements. The Treaty of Versailles adopted that idea, but back home in the United States, there was not support for involving America in any association that could diminish US sovereignty over its own affairs or involve the US again in wars beyond those pertinent to the United States' own national security.
I believe the best answer is A) Johnson was too lenient on the Confederate leaders.
I hope this helped