Final answer:
The reason researchers are not interested in identity changes that occur in adolescence is 'c. It remains stable throughout life' because identity during adolescence is not stable; it undergoes significant evolution as a result of psychosocial changes.
Step-by-step explanation:
Researchers are interested in the identity changes that occur in adolescence for various reasons. However, the option that does not accurately represent their interest in these changes is c. It remains stable throughout life. This statement is incorrect because adolescence is a period marked by significant psychosocial changes, including developing a strong sense of personal identity, which is anything but stable during this time. Identity continues to evolve and is influenced by various factors such as puberty, cognitive development, mental health, and social interactions. Adolescents go through a process of exploring different selves to determine their core values and beliefs, often influenced by peer and parental expectations, which can lead to role confusion if not successfully navigated. On the contrary, identity changes during adolescence can profoundly affect career choices, mental health, and interpersonal relationships, which illustrates the dynamism of this developmental stage.