What is the purpose of the NCh2437.Of1999 standard?

I- To establish the conditions for the operation of a tower crane and the safety measures that must be adopted.
II- To define the terminology used in the operation of a tower crane.
III- To establish the requirements for the safety of tower cranes.
IV- To establish the requirements for the qualification of a tower crane operator.
a) Only I and II are correct.
b) Only I, II, and III are correct.
c) Only I, III, and IV are correct.
d) Only II, III, and IV are correct.