In girls, what is the first sign of puberty?

Rationale: A. Growth of pubic hair: Pubic hair growth, or pubarche, typically occurs after the initial signs of puberty and is a secondary sexual characteristic, not the first sign. B. Growth spurt: The rapid increase in height follows the onset of puberty but usually comes after breast development has started. C. Breast bud development: Thelarche, or breast bud development, is the earliest visible sign of puberty in girls, marking the start of hormonal changes and sexual maturation. D. Menarche: Menarche, the onset of menstruation, occurs later in puberty after several other physical changes, including breast development and growth spurt.