Answer:
The correct answer is option A: "African Americans".
Explanation:
Most of the progressive reforms were approved in what is known as the Progressive Era (1890s to 1920s), a period of time were social activism and political reforms was widely spread. However, the civil rights of African Americans were largely ignored during this Era, mainly by the affirmation of the constitutionality of many racist laws in the Southern region of the United States.
