Post-Impressionism is a term used to describe the reaction in the 1880s against Impressionism. It was led by Paul Cézanne, Paul Gauguin, Vincent van Gogh and Georges Seurat. The Post-Impressionists rejected Impressionism's concern with the spontaneous and naturalistic rendering of light and color.
I would say A. Advertisers tend to target their ads at a certain age group, and using different types of music can have a different appeal to a certain age group. If they want certain people paying attention to their ads, they'll most likely use a song from their generation.