The progressive movement focused mainly on the problems of

a. African AMericans
b. urban residents
c. tenant farmers
d. nonunionized workers

is it A or D?

It wasn't African-Americans -- so D must be the answer.

Urban resists

To determine the correct answer to this question, we need to examine the main concerns and goals of the progressive movement. The progressive movement was a reform movement that emerged in the late 19th and early 20th centuries with the aim of addressing various social and political issues. It sought to address the negative effects of industrialization, urbanization, and political corruption.

While African Americans did face significant challenges and discrimination during this time, the progressive movement's main focus was not specifically on their problems. Therefore, we can eliminate option A.

On the other hand, non-unionized workers were indeed a significant concern for the progressive movement. Poor working conditions, low wages, and lack of bargaining power were key issues that the movement aimed to improve. Therefore, option D seems to be a more reasonable choice.

However, it is also worth noting that the progressive movement also focused on the problems of urban residents and tenant farmers. The movement advocated for social and housing reforms to address the overcrowded and unsanitary conditions in cities, as well as agricultural reforms to help small farmers facing economic challenges.

In conclusion, while both option D (nonunionized workers) and option B (urban residents) were significant concerns for the progressive movement, option D is more explicitly associated with the movement's aims. Therefore, the answer is D.