The school nurse is teaching a group of female students about the female reproductive system. A student asks how she will know she is starting puberty. Which information should the nurse discuss?

A. A dark line of pigmentation occurs along the midline of the abdomen: This refers to linea nigra, which is more commonly associated with hormonal changes during pregnancy rather than puberty. It is not a typical sign of puberty in adolescent females.B. Weight gain becomes obvious as the hip circumference increases: While changes in body shape and fat distribution occur during puberty especially with increased fat around the hips and thighs, it is usually a gradual process and not the first noticeable sign.C. The areolar color of the nipples changes from pink to dark brown: Areolar pigmentation may darken with puberty in some individuals, but it varies by skin tone and is not a reliable or universal first sign of puberty.D. The development of breast buds will form under the nipples: The appearance of breast buds or thelarche, small, firm lumps form under the nipples, which can sometimes be tender, is typically the first visible sign of puberty in girls, usually occurring around ages 8–13. It signals the beginning of hormonal changes and physical development.