Reading your comments on A being incorrect, I would have to say C since A is true. Hope this helps :)
Isis is the Egyptian goddess of health, marriage, and wisdom.
Most medieval manuscripts, illuminated or not, were written on parchment (most commonly of calf, sheep, or goat skin), but mostmanuscripts important enough to illuminate were written on the best quality of parchment, called vellum. beggining in the late middle ages, manuscripts began to be produced on paper.
It won’t let me post it on here