Answer: B. Portrait photography gained almost immediate acceptance.
Explanation: Artists had been painting and creating other types of portraits for hundreds if not thousands of years before photography, so when photography was introduced to the public it became very popular and it gained nearly immediate acceptance and enthusiasm as a means for creating portraits. By about the mid-19th century, photography studios existed in many places and were especially popular in American cities. The camera create the ability to produce a portrait of an individual or a family rather cheaply- this being something that hadn't been possible before. Due to the price being much lower now it opened up the portraiture to more people, including those of middle and even lower classes. Some of those portrait photographers in those early days were painters who turned to this new art form.
