d. Honore Daumier.
Explanation:
Honore Daumier was a French painter, sculptor, caricaturist etc who painted the painting in question. This oil painting "The Third Class Carriage" was made in 1864 and is currently in the possession of the Metropolitan Museum of Art in New York.
The painting is part of Daumier's interested artwork related to the working classes. He painted this depicting the life of the working classes, tired looking men and women cramped in a small compartment in the train. The background also shows numerous rows of men and women in the same state, unable to afford better tickets. The prominent part of the painting shows a woman feeding her baby, alongside an older woman holding a basket and a young boy sleeping soundly but uncomfortably.