Question

multiple choice question
the ancient greek physician galen believed that disease was caused by four bad ______.

miasmas
blood
humors

Explanation:

Galen expanded on the ancient Greek theory of the four humors (blood, phlegm, yellow bile, black bile), positing that disease arose from an imbalance or "bad" state of these bodily fluids. Miasmas were a later theory of foul air causing disease, and "blood" alone is only one component of the four humors, not the full set Galen referenced.

Answer:

C. humors