Which of the following statements is/are correct in the context of agents of socialization:

(I) The agents or agencies of socialization are those institutions that contribute to the process of socialization of an individual.

(II) The secondary agents of socialization include family members and relatives as the child begins to interact with them from his birth.

(III) The primary agents of socialization include those institutions which help a child in his socialization in the later years of his life and continue throughout his life.