In the 1905 United States Supreme Court decision in Lochner v. New York, justices upheld which of the following in reference to employee working conditions?

This option incorrectly includes the planter class, which largely opposed Reconstruction efforts and sought to maintain their pre-war social and economic power. The planter class was not a significant group in the push for reconstruction, as they often resisted the changes brought about by the other groups listed.

While formerly enslaved people were integral to the political landscape during Reconstruction, small farmers did not have the same political influence as scalawags or carpetbaggers. Additionally, the planter class's opposition to these groups makes this combination inaccurate for representing those in power.

This option erroneously includes former Confederate officials, who were often excluded from political power during Reconstruction due to their previous roles in the rebellion. Yankees, or Northerners, were not a distinct political group in the South during this period, which further invalidates this option.