这里求指教。and平行结构逗号用法subject to用法

bessieUNL

Though the law will require emissions testing of all diesel vehicles, from tractor trailers to excursion buses, it will have no effect on sport utility vehicles, almost all of which are gasoline powered, and will not be subjected to emissions-control standards as stringent as they are for diesel-powered vehicles.


A. powered, and will not be subjected to emissions-control standards as stringent as they are for
B. powered, and therefore not subjected to emissions-control standards that are as stringent as those of
C. powered and therefore not subject to emissions-control standards as stringent as those for
D. powered, which are not subject to emissions-control standards as stringent as they are for
E. powered and therefore they are not subject to emissions-control standards as stringent as those of


正确答案是C。
求科普求科普

bessieUNL

求别沉 LZ一把辛酸泪阿

兰心寒

我觉得这里主要是要弄清楚整个句子的意思就能知道正确答案非C莫属了。
这句的意思是，虽然法律要求...，但是这法律对suv没用，大部分suv都是用的汽油（未划线部分的which指代suv），而什么not subject to emissions control standards呢？subject to是隶属于，服从于的意思。
所以句子显然是在说，而suv不属于这些standards（对应law）的范畴，紧接着those指代standards，明确说明原因是这些standards只对柴油机而言。