Answer:
A. psychoanalytic
Explanation:
The basis of psychoanalytic approach is that the behaviour of a person is determined by past experiences. This study focuses mainly on the unconscious mind.
Juan used to be a generous person who liked giving out things to people but after they repeatedly returned his things broken and damaged or sometimes not at all, he decided to stop being generous. His subsequent decision and behaviour was shaped as a result of the bad experiences he had in the past after giving out his things to people.
Juan used the past experiences to tailor his future responses, he stopped being generous and the explanation of his personality change is based on psychoanalytic explanation.