Pick your answer from:
[I] Preparing a training bra for girls can be a heavy step that can lead to bigger, more powerful breasts. Talk with your daughter about this, and inquire if a training bra or bodyweight is right for her.
[II] Take her shopping for a training bra when this development starts to help her feel comfortable about her changing body. This change may start as young as 8 in some girls.
[III] In the first few weeks of her growth, tell her to see a doctor to determine if she needs to change her bra size or make changes to improve her breasts. Also tell her that breast waxing has not been confirmed and she may need to get a breast reduction.
[IV] Discuss the possibility of getting a bra during puberty with your daughter, if that is what she wants. Undergo tutorials and observe her performance during puberty.Choose from options above and answer: What most naturally follows?

How to help prepare a preteen girl for puberty 
Get her a training bra as soon as her breasts start to develop. 
One of the most noticeable changes that may occur to girls during puberty is the growth of breast tissue. Explain to your child that this is normal, and that is happens differently for every girl.
Answer:
[II]