24.小明知道姊姊雖然穿上男生的衣服,姊姊仍然是女生,不會變成男生。這種現象說明小明已具 備何種性別概念?(A)性別認同(gender identity)(B)性別穩定(gender stability)(C)性別區隔(gender segregation)(D)性別恆定(gender consistency)