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.

Water and soil are brought into the indus river valley as a result of a. high winds b. annual floods c. long droughts d. seasonal tornadoes

Moderate climates are located in regions. a. coastal b. interior c. mountain d. polar select the best answer from the choices provided a b c d

Before they can be published, scientific papers must be peer-reviewed. this means that: a) some other scientific experts read the papers and guarantee that they are true.b) some other scientific experts read the papers and provide quality control by eliminating many mistakes.c) an editor reads the papers, to make sure that all the semicolons are in the correct places.d) everyone in the world is given the opportunity to comment on the papers through a specially maintainedblog.e) government bureaucrats read the papers, to be sure that the papers do not insult the political positions ofthe current officeholders.