Answer:
calotypes are negatives that can be readily reproduced
Step-by-step explanation:
calotypes process is used in photograph development in which multiple prints can be developed from a single negative.
The process involves exposing light to silver chloride coated paper in camera roll. The area which was hit by light on paper became dark, thus negative image was produced. This negative image can now be used to produce multiple image. This process helped in reduction of exposure time in camera from an hours to a minute.
Based on option provided in question option c is most accurate which discuss about main advantage of caloptypes i.e use of negatives to reproduce prints.