76.下列睪丸腫瘤中,何者之發生年齡層最老?(A)胚胎性癌(embryonal carcinoma) (B)卵黃囊瘤(yolk sac tumor) (C)絨毛膜癌(choriocarcinoma) (D)精細胞性瘤(spermatocytic tumor)