Final answer:
Established interpretations of Manet's A Bar at the Folies-Bergère include a reflection on social and class issues, not religious themes, nature or abstract shapes.
Step-by-step explanation:
Some of the established interpretations of Manet's A Bar at the Folies-Bergère include A) a reflection of social and class issues, as it portrays the complexities of modern life and the status of individuals within the urban setting. Manet's technique emphasized the surface of the picture plane and the material quality of paint, which were modern approaches for the time and created a challenge to traditional Renaissance styles.
The painting does not focus on religious themes, nature and the outdoors, or abstraction, making options B, C, and D incorrect with regard to the interpretations of the artwork.