What are the characteristics of companies?

I. They are entities programmed with relative permanence.
II. They must have a structure to regulate and determine their activities and establish levels or hierarchy for decision-making.
III. They are oriented towards achieving objectives.
IV. They must use diversification in their activities.
a) I and II are correct.
b) II and III are correct.
c) I, II, and III are correct.
d) II, III, and IV are correct.