Answer:
B, assist the girl with the transformation.
Step-by-step explanation:
The girl is 17 years old, on the edge of adulthood. She needs different kind of care now, also related with her sexual health and practices.
The nurse can assist the girl during the transition, explaining to her what routine procedures may be necessary/obligatory and how to make appointments for them. She could also explain to the girl how to take care of her health now: proper nutrition, exercise, personal hygiene.
The nurse's assistance may be necessary for the girl, especially is she is a shy person and afraid of doctors or not willing to talk about her personal issues.