In Prescientific Times, a Discredited Notion Held That Human Health

Multiple Choice

In prescientific times, a discredited notion held that human health depended on the correct balance of four "humors," including blood, which was not known to circulate.At that time, leeches were used in bleeding to supposedly reduce the amount of blood as a humor, but today

A) leeches are used to eliminate pools of coagulated blood.
B) ticks are used to encourage bleeding.
C) earthworms are used to reduce blood throughout the body.
D) there is no use of leeches in medicine.
E) leeches are important in soil development.