Based on Their World View, a Renaissance Physician Might Cure

Based on their world view, a Renaissance physician might cure a skull fracture or brain damage by administrating walnuts. The reason being:

A) Walnuts shells resemble the skull and the nut the human brain.
B) Walnuts shells and nuts contain chemicals that could reduce brain swelling.
C) Walnuts were used by Plato and Aristotle in their day.
D) Galileo had shown that Walnuts were very nourishing and healthy.