29. 下列何者是胃癌的危險因子？ (1) Familiar adenomatous polyposis (2) Fundic gland polyp (3) Non-steroid anti-inflammatory drug-related gastritis (4) Intestinal metaplasia (5) Helicobacter pylori infection (A) (1)＋(2) (B) (1)＋(3)＋(4)＋(5) (C) (1)＋(3)＋(5) (D) (1)＋(4)＋(5) (E) (3)＋(4)＋(5)