The code of hammurabi was one of the first writings that outlined
a) directions for medical procedures
b) medical uses for herbs and other substances
c) patient rights
d) doctor training requirements

The Code of Hammurabi is a code of law that is dated back to the era of Mesopotamia, a region that is historically located around modern day Iraq, Kuwait, Saudi Arabia, Turkey, and Syria. It is one of the oldest form of writings found in the world. It contains various things, but it focuses more on the conduct of law for various circumstances depending on one’s social status (by gender, by position).

Interestingly, it also contains (D) doctor training requirements.