Which process was called a wet plate because negatives had to be exposed and developed while they were still moist? The process was widely-used in 1855, and was called a wet plate because negatives had to be exposed and developed while they were still moist.

"prior to 1910, these new artists were called neo-impressionists, and they believed that "modern paris" was the proper subject for their paintings."

this is the text provided by the program, disregard other answers, as they are confusing and based on loose knowledge of the subject.   : )