请教一个GWD语法题~

Eric小宇子

这题是GWD21里面的一道语法题，我选了E。想问一下为啥选B啊。这题的意思有点模糊”根据最近的调查，城市的街道可能变得更干净，fire code...“ 我不是很能理解这个意思，求NN帮忙！

Accordingto a recent survey of municipal services, the city’s streets could be cleaner,its fire code be better enforced, and its crime rate reduced if thecurrent administration improved its management practices.

A.  be better enforced, and its crime rate reduced

B.   better enforced, and its crime rate reduced

C.   could be better enforced, and it couldreduce its crime rate

D.   better enforced, and its crime rate couldreduce

E.   could be better enforced, and its crime ratereduce

Eric小宇子

求助~