27.下列何種大腸桿菌的感染最易引起腸道 attaching and effacing lesion(A/E lesion)？ (A)腸凝集性大腸桿菌(enteroaggregative E.coli) (B)腸致病性大腸桿菌(enteropathogenic E. coli) (C)腸侵襲性大腸桿菌(enteroinvasive E. coli) (D)腸產毒性大腸桿菌(enterotoxigenic E. coli)