In Ancient Egypt, How Was Demotic Writing Used

In ancient Egypt, how was demotic writing used?

A) It was used exclusively by priests in temples or by royal officials in their work.
B) It was used extensively because it was a cursive script written with ink on pottery or papyrus.
C) It was so highly complex that far fewer people could learn to read it than the cuneiform script in Mesopotamia.
D) It was not used because it was seen by the upper classes as a waste of effort that detracted from developing military skills.