Scholars believe the first people who arrived in the americas came from

Siberia, came across a land bridge that connected to Alaska.

1. "Former slaves could not sue in court" is the one common restriction included in the black codes. The correct option among all the options given in the question is option "D".

2. President Johnson deviated from his original plan of punishing Southern aristocrats by making it difficult for states to reenter the Union because Johnson believed that the Union was paramount and the South should be represented. The correct option is option "C".

3. "Northerners were growing increasingly hostile to President Johnson, and no longer wanted to support his agenda" was not a reason the North began to lose interest in the Southern Reconstruction by the early 1870s. The correct option is option "E".