Which art movement painted city life and working people with concrete realism and no frills?

Realism

The ashcan school

The Eakins school

Abstract

The answer is

The ashcan school

Explanation:

This group of painters was inspired by Robert Henri. The ideas of this artistic group were to paint the lifestyle of marginalized groups, finding inspiration on European realism, especially the French painting of the 19th century. The Ashcan School can be considered a revolutionary movement, because of their proposal to paint a part of the American life that was not considered worthy such as the working class and the immigrants. For the most part, this group was influenced by the scientific approach that emerged in the final decades of the 19th century, especially the French Positivism.