24、我们应该这样理解青春：  （    ）

①是秀丽的容颜、优雅的气质、健美的身姿  ②拥有青春我们就可以坐享其成  ③是活力的象征，蕴涵着智慧和力量 ④拥有青春，我们每天都站在起跑线上，迎接新的挑战                                                                                                                                                                                                                                                                                                                                                                              

A．①②③          B．②③④        C．①②④         D．①③④