According to the text, what are the challenges that every teenager must face?

I. Accepting their physical constitution and acquiring a male or female role.
II. Establishing appropriate relationships with people of their age and both sexes.
III. Achieving emotional independence from their parents and other adults.
IV. Achieving the security of obtaining economic independence.
V. Choosing a vocation and preparing for it.
VI. Developing cognitive skills and concepts necessary for social competence.
VII. Understanding and performing socially responsible behavior.
VIII. Preparing to get married and start a family.
IX. Acquiring values that harmonize with a correct scientific conception of the world.
a) I, II, III, IV, V, VI, VII, VIII and IX.
b) I, II, III, IV, V, VI, VII and VIII.
c) I, II, III, IV, V, VI and VII.
d) I, II, III, IV, V and VI.
e) I, II, III, IV and V.