Scribes generally used the hieratic form when they were writing on papyrus and hieroglyphs when they were carving inscriptions in plaster or limestone. Later, in about 700 B. C., hieratic writing was simplified further and became the form known as demotic. It was in demotic, of course, that one of the passages on the Rosetta Stone was carved. —The Riddle of the Rosetta Stone,
James Cross Giblin

Choose the best meaning for the word "hieratic” as it is used in the passage.

having lots of style
having to do with priests
a form of cursive writing
very formal