Which of the following is true?

(A). Silver halides are commonly referred to as light-sensitive chemicals and are extensively used in photographic film and paper.

(B). The diazo microfilms are usually used for duplicate or working copies.

(C). Silver halides have archival uses due to the chemical stability of metallic silver. 

(D). The vesicular process is a system of dry photography involving exposure to ultraviolet light and development by heat.