What is the purpose of the NCh1619.Of79 standard?

I- To evaluate noise in relation to the reaction of the community.
II- To establish a method for measuring noise in residential, industrial, and traffic areas.
III- To consider other factors related to the production of noise and sound radiation.
IV- To regulate the noise caused by airplanes near airports.
a) Only I and II are correct.
b) Only I, II, and III are correct.
c) Only I, II, and IV are correct.
d) All statements are correct.