Which of the following statements is true of the practice of trephination?

Multiple Choice

a. It involved drilling a small hole in a person's skull to release spirits or demons responsible for psychological disturbances.
b. It was a technique used by the Church to distinguish good witchcraft from bad.
c. It involved tying a woman's hands and feet and throwing her into a lake or river to determine whether she was a witch.
d. It was used to make connections between a person's bodily organs and emotions.