12. 下列何者為良性淋巴上皮病灶(benign lymphoepithelial lesion)之鏡下所見?(A)上皮肌上皮小島(epimyoepithelial island)(B)基質的黏液性改變(myxomatous change of the stroma)(C)向管腔的乳突狀突起(papillary projection to the lumen)(D)瑞士乳酪樣表現(Swiss cheese appearance)