The correct answer is D. Core self or the search to maintain integrity and identity.
Step-by-step explanation:
In psychology, sociology and similar fields, the term "self theories" refer to the theories or ideas individual create about themselves in terms of their identity, behaviors, relation with others and other aspects. All of these aspects are linked to the search of the individual to determine his/her core self (basic aspects of the self) and also to preserve integrity and identity. Because of this, these theories have been explored by multiple authors and usually involve concepts such as the image the individual has about himself/ herself, the way the individual wants to be and the perception of the individual about the way others perceive him/her. Considering this, it can be concluded self theories emphasize the core self or the search to maintain integrity and identity, because these theories focused on the individual itself and the way this constructs and preserves its identity and integrity while relating to others.