Answer:
C. identity achievement
Step-by-step explanation:
James Marcia is a psychologist who developed a theory about identity in adolescence and the different status they go through in order to reach their identity.
The last status according to Marcia is identity achievement and it takes place after the adolescent has explored his/her options and has chosen one and committed to it according to their beliefs and preferences. This stage only takes place after a process of active exploration of options.
In this example, Nancy was undecided about what to study, so he went into a process of significant exploration of both of her options and she finally chose and undergraduate program in engineering with a minor in music. We can see that she explored her options and she chose one and committed to it. Thus, she is in the status of identity achievement.