Answer:
Option A, an identity crisis, is the right answer.
Explanation:
Coined by Erik Erikson, the term identity crisis is used to refer the failure to accomplish ego integrity by an individual during his/her adolescence. The adolescence stage is a stage during which some physical changes ( physical growth and sexual maturity) as well as integrating ideas such as what others would be thinking of them, takes place.
Due to such changes, adolescents face a number of issues which prevents them from developing a strong identity. During this time, they do not have any idea about what or who they are, what should they do etc. As a result of this, they may withdraw from normal life. In the given situation, Gisela is experiencing an identity crisis.