Final answer:
During adolescence, it is almost impossible to achieve a solid career identity, as this stage is focused on exploration rather than making final career decisions. Adolescents are more likely to explore and form aspects of their identity such as gender, ethnic, and religious identities.
Step-by-step explanation:
The type of identity that is almost impossible to achieve during adolescence is c) Career identity. Adolescents are in the process of exploring various aspects of their identities but have not typically settled into a career path. This stage is more about self-exploration and considering future possibilities rather than making definitive career choices. This aligns with Erik Erikson's psychosocial stage of identity versus role confusion, where adolescents work on establishing a sense of self. A secure career identity generally develops later in life after experimenting with and integrating different roles and job experiences.
In contrast, other aspects of identity like gender identity, ethnic identity, and religious identity are often explored and can be more solidly formed during adolescence. Each of these identities can influence and be a part of the broader self-concept that an adolescent is developing.