Answer:
Donald Super
Explanation:
Donald Super's theory: The theory proposed by Donald Super influences the main idea of an individual developing a sense of self and making the person realize that getting the change with time plays a vital role especially when he or she is planning the career.
According to him, self-concept of a person or the sense of self changes over time and gets modified and developed with experience, for example, the career development of a person is life-long.
In the question above, the statement refers to the work of Donald Super.