Before Jeff had had the opportunity to explore his vocation on his own, his parents told him that he was expected to take over the family restaurant after graduating, and Jeff readily agreed. Which identity status has Jeff adopted?

Foreclosure.

Explanation:

The theory of Identity Status was developed by James Marcia in his book titled "Ego Identity: A Handbook for Psychosocial Research." He defined four types of identities namely Foreclosure, Identity Diffusion, Moratorium, and Identity Achievement.

Identity Foreclosure is a psychological term used to refer to those adolescents who have accepted the identity given by their parents without identifying other alternatives. At this stage of identity status, adolescents tend to adopt and accept the traits given to them by their parents, society, or friends without truly seeking for self or own identity.

In the given case, Jeff agreed to the career option of taking over the family restaurant without exploring other career options is an example of identity foreclosure. It is an example of Foreclosure because, Jeff, who did not have an opportunity of exploring career options or his vocation accepted the identity given by his parents. He did not find his own identity or career options.

So, the correct answer is Identity Foreclosure.