Final answer:
Photographic portrait studios became popular in the 1850s and started serving the needs of the middle classes.
Step-by-step explanation:
By the 1850s, photographic portrait studios became quite popular and began to serve the needs of the middle classes who had a demand for portraiture. Prior to photography, the middle classes could not afford the volume and cost of oil paintings to record their likenesses. The invention of the Daguerreotype in the early 1900s made photography more accessible and affordable for the general public, leading to the rise of commercial photographic studios.