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题库 / GMATLA-SC-60
The Environmental Protection Agency's proposal to place restrictions on both diesel fuel and diesel engines has sparked a counterattack by the oil industry, saying that the move will exacerbate the nation's fuel supply problems.
on both diesel fuel and diesel engines has sparked a counterattack by the oil industry, saying
on both diesel fuel and engines have sparked the oil industry to counterattack, and they say
on both diesel fuel and diesel engines has sparked a counterattack by the oil industry, which says
both on diesel fuel and engines has sparked the oil industry to a counterattack, saying
both on diesel fuel and diesel engines have sparked the oil industry to counterattack, and it says
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A和C的差别主要在于say的这个主语到底是谁，A的发出者是proposal， C是oil industry，相比之下应该是后者更合理；
Ron 大神：COMMA + -ING modifiers modify the ENTIRE PRECEDING CLAUSE (including the subject of that clause).
A/C 选项，say是oil industry 的动作，所以用which says而不用saying。
貌似saying和which says都可以跳跃修饰counterattack的样子。。。
一般，句末的逗号+ing短语均可以被认为成伴随状语哟～登录 或 注册 后可以参加讨论
你看看后面的逻辑意思应该是：这个行动会加剧能源问题。所以which跳过介词短语指代counterattack（反击）
嗯，有些明白了。
再看，感觉不大对啊。industry应该是可以saying的，既然他可以发起counter attack这个动作。登录 或 注册 后可以参加讨论