Respuesta :
I think its A, around 12 years old is when your body is changing.
(A) Change is what often causes an individual to question her identity. The author makes the point that the sudden bodily changes that occur during puberty are accompanied by dramatic changes in thoughts and feelings, so that the sense of self that was formerly strong becomes more fragile. The teenager begins to ask herself, "Just who am I?" that is, to question her identity.