What is the definition of philosophy according to the text?

I- Philosophy is the study of the first causes and principles of everything that exists.
II- Philosophy is an interpretation of the world to make the revolution.
III- Philosophy is an effective knowledge of everything that exists.
IV- Philosophy is a universal knowledge that deals with the great problems of man and the world from an eminently rational, critical, and transcendent point of view.
a) Only I and II are correct.
b) Only III and IV are correct.
c) I, III, and IV are correct.
d) I, II, III, and IV are correct.