What do the terms thelarche, menarche, and spermarche refer to?

What do the terms thelarche, menarche, and spermarche refer to?

• A. Thelarche is the onset of breast development; menarche is first menstruation; spermarche is first ejaculation
• B. Thelarche is first ejaculation; menarche is first menstruation; spermarche is first ejaculation
• C. Thelarche is first hair growth; menarche is first period; spermarche is growth spurt
• D. Thelarche is full puberty; menarche is puberty completion; spermarche is puberty onset

Answer: (B)