Final answer:
The Yellow Dog Contract, Ironclad Oath, and Blacklisting are historical terms related to labor and political movements in the United States.
Step-by-step explanation:
The Yellow Dog Contract, Ironclad Oath, and Blacklisting are all historical terms related to labor and political movements in the United States.
The Yellow Dog Contract refers to a type of employment contract in which workers were required to agree not to join a labor union as a condition of employment. This was used by employers to suppress labor organization and maintain control over their workforce.
The Ironclad Oath was an oath required by the Wade-Davis Bill, which was a proposed law during the Reconstruction Era. The oath required individuals to swear that they had never supported the Confederacy, and it was seen as a way to exclude former Confederate officials from holding office.
Blacklisting was a practice used by the House Committee on Un-American Activities during the McCarthy era. It involved creating a list of individuals who were suspected of having Communist or subversive affiliations, which could result in them being denied employment or facing other forms of professional and social ostracism.