[单项选择]下列5种传染病感染过程中最常见的是（）。
A. 病原体被清除
B. 隐性感染
C. 显性感染
D. 病原携带状态
E. 潜伏性感染

One evening, when Bagehot was at university, a student who lived next door to him fell badly ill. An ambulance was called, but its route was blocked by a pile of clothes and a gaggle of drunk, naked young men. They were members of a drinking society (roughly analogous to American fraternities). The boozy nudity at precisely this spot, they explained, refusing to budge, was an awfully important initiation rite.
This incident came to mind last month when something not dissimilar happened near Wigan, in northern England. A group of youths obstructed an ambulance and harassed the paramedics in it, whose patient died. That little act of thuggery was scarcely noticed amid the ongoing run of murders by British youngsters, by knife and sometimes gun. Most of the victims have been young too: 18 people aged 18 or under have been killed in London this year, stabbed on the street or shot in nightclubs—not many by Los Angeles standards, perhaps, but troubling b