I think that the answer best suited is C
Based on the given paragraph above from "Adolescence and Personality", the society should begin to focus on when talking with adolescents is about their personal achievements. And these personal achievements must be those achievements that are appropriate for the current stage they are dealing with Adolescents are still on the search of their role and identity in the society, so talks about careers should not be opened first.
A. Have been investigating
Pretty sure that's it.
