Final answer:
Alexandra might be struggling with the 'intimacy versus isolation' stage in Erikson's theory, where she is facing difficulties in forming close relationships and could be experiencing feelings of isolation.
Step-by-step explanation:
According to Erikson, Alexandra might be experiencing a challenge in the stage of 'intimacy versus isolation,' which occurs in early adulthood. At this stage, individuals are concerned with forming close, intimate relationships with others. Erikson believed that a strong sense of self needs to be developed in adolescence before successful intimate relationships can be formed in adulthood.
Alexandra's difficulty in forming close relationships and tendency to compete rather than cooperate could suggest that she is dealing with feelings of isolation and has not yet successfully completed the developmental task associated with this stage, possibly due to an underdeveloped sense of self from the previous stage.