What is the purpose of the NCh 19.Of79 standard?

The purpose of the NCh 19.Of79 standard is to prevent risks related to piping systems.
The NCh 19.Of79 standard describes the identification methods and safety measures for piping systems.
The NCh 19.Of79 standard establishes the colors to be used for safety in piping systems.
a) Only I is correct.
b) Only II is correct.
c) Only III is correct.
d) I and II are correct.
e) II and III are correct.