The correct answer is anticipatory socialization
Anticipatory socialization refers to the process in which a person who is non-member of a certain group (in this case, the group being one of Olympic swimmers) learns to absorb the values, customs, behaviors and actions of the group in order to "ease" their entry in a group and be fully equipped to catch up to the members skill level. In this instance, the young girl is performing anticipatory socialization in her quest to one day become an Olympic swimmer.