单项选择题

A.黏膜隆起呈息肉状、有蒂
B.黏膜广泛充血、水肿、糜烂,表面有脓苔
C.黏膜呈鹅卵石样增生,肠腔明显狭窄
D.跳跃式分布的纵形或匍行性深溃疡
E.黏膜破裂出血