Final answer:
The Harlem Renaissance artists and writers of the 1920s, influenced by the era's social changes, focused on urbanization issues, reflecting the transforming social norms and urban life.
Step-by-step explanation:
The social changes of the 1920s greatly influenced American artists and writers, providing a wealth of material for their creative works. The Harlem Renaissance was a pivotal movement during this era, showcasing the immense contribution of African American culture to the broader American society. As an artistic, social, and intellectual explosion, the Harlem Renaissance highlighted issues such as racism, discrimination, and the African American experience. This period also gave rise to the Jazz Age, where jazz music greatly influenced the nation and became deeply intertwined with the fabric of 1920s culture.
Considering the options provided, the authors of the Harlem Renaissance, who were part of this transformative time, were likely to focus on C) Urbanization issues, as these reflected the changing morality, social norms, and urban life that characterized the era. Stories and poems delved into the lives of people dealing with the fast pace and social diversity of city life, embodying the spirit of change and modernity.