A.
Because
B is improve acting
C is impromptu
D is sight reading
The most educated people in medieval societies were priests and nuns. Most schools were located within monasteries and unlike regular people who chose whether or not to get at least some education, priests and nuns often had to educate themselves because of sacred texts. Many of them even worked as copying machines and had to rewrite books.
I don't if this is right but I put c
Gross domestic product and purchasing power parity I hope this helps
