8. 下列何者將骨盆的坐骨大小孔分開?(A) 頸薦韌帶 (sacrocervical ligament)(B) 薦棘韌帶 (sacrospinal ligament)(C) 薦髂韌帶 (sacroiliac ligament)(D) 薦結節韌帶 (sacrotuberous ligament)