2. 下列何者是胃腺癌(gastric adenocarcinoma)之危險因子？(1)Alcoholism；(2)Helicobacter pylori infection；(3)Diet high in salted and preserved food；(4)Subtotalgastrectomy；(5) Hereditary hemorrhagic telangiectasia
(A) (1)+(2)+(3)
(B) (1)+(3)+(4)
(C) (2)+(3)+(4)
(D) (2)+(3)+(5)
(E) (3)+(4)+(5)