Answer:
B. Humour
Step-by-step explanation:
Sanguine, choleric, melancholic and phlegmatic are the four temperaments that are presented by the four temperament theory. This, in turn, has its origins on the ancient medical concept of humorism. Humorism states that our "humours" (chemical systems that regulate our behaviour) were responsible for our temperament. Humours are often described as "bodily fluids."