晚期肝硬化最严重的并发症是（）

A.肝肾综合征

B.肝性脑病

C.上消化道出血

D.原发性肝癌

E.电解质紊乱

The growth of switching has (135) a new generation of network management tools that help (136) cope with the challenges, (137) them to correlate device alarms in order to (138) pinpoint root causes, or to monitor service levels without depending on IP subnet schemes. These new tools have become essential to coping with the primary (139) effect of any treatment that significantly increases network flexibility: added complexity.

A．back

B．side

C．front

D．lateral