Alright look, I am not 100% sure, but I am going to try to help you the best I can. I personally think it's in government archives because it would have been stored away there and would most likely be preserved so people can learn about it and it's origins.
Answer: Hey! The answer to your question is B. The substance that is added to a color in order to help application. Why? Because in painting, medium is the substance that is added to a color in order to help application.
Hope this helps ya after waiting for so long! :) Have a great day!
Well, it was something that the Tigris and Euphrates River dumped to, and was also called that because it was shaped like a crescent. it was I think egyptians used.
I think that the answer would be C.