77.下列何種細菌最常引起胃炎和胃潰瘍?(A)傷寒桿菌(Salmonella Typhi)(B)小腸結腸炎耶爾森氏菌(Yersinia enterocolitica)(C)空腸曲狀桿菌(Campylobacter jejuni)(D)幽門螺旋桿菌(Helicobacter pylori)