The answer to your equation is C.! Hope this helps!
Van Eyck and his brother improved the use of B.) oil paints
Since this is the bass clef,
•G is on the bottom line,
•E is on the 2nd space and
•D is on the middle line.
It spells GED and I don't think that's a word but oh well ¯\_(ツ)_/¯
I hope I helped!
Answer:B because it was from the 900s-1200s
