The answer is External locus of control.
Introversion refers to a personality trait where individuals tend to be more reserved, enjoy solitary activities, and feel drained by social interactions. Christina's statements do not indicate a preference for solitude or social interaction, so this concept does not apply.
Extroversion is the opposite of introversion, where individuals are outgoing, enjoy social interactions, and feel energized by being around others. Christina's behavior, as described, does not relate to social interaction preferences, so this concept is not applicable.
Dependability refers to being reliable and trustworthy. Christina's statements do not provide information about her reliability or trustworthiness, so this concept does not fit her behavior.
An external locus of control is a psychological concept where individuals believe that their life events are controlled by external factors rather than their own actions. Christina's statements, such as "Why does this always happen to me" and "This is not my fault," suggest that she attributes her experiences to external circumstances, making this the most applicable concept.