For instance, in this sentence, change "buy(ing) on credit" to "buy(ing) expensive items on credit or borrow(ing) substantial sums of money".
With a phrase that long, choice B, while still technically correct, will become completely unreadable. With its agreement problem fixed, choice C will still work well.
我看到有个说法是，如果伴随状语与主句的时间不一致，要将表示主动/被动的分词改成状语句的时态，但不表示时间框架不一样就不能用伴随状语。如：
Wrong: The country's economy is unstable, the result of a stock market crash occurring ten years ago.
occurring跟随主句主动词is的时态，表示发生在现在，实际是发生在过去，因此modifier的动词不能用-ing，本题改成过去式。如果从句时间是将来，改成将来式will occur。
Right: The country's economy is unstable, the result of a stock market crash occurred ten years ago.
我看到有个说法是，如果伴随状语与主句的时间不一致，要将表示主动/被动的分词改成状语句的时态，但不表示时间框架不一样就不能用伴随状语。如：
Wrong: The country's economy is unstable, the result of a stock market crash occurring ten years ago.
occurring跟随主句主动词is的时态，表示发生在现在，实际是发生在过去，因此modifier的动词不能用-ing，本题改成过去式。如果从句时间是将来，改成将来式will occur。
Right: The country's economy is unstable, the result of a stock market crash occurred ten years ago.
The first presents a development that the argument predicts will have a certain outcome; the second acknowledges a consideration that weighs against that prediction.
第一个表明了预测会有certain outcome,即为seeds expensive, more water and fetilizer; 第二个承认了一个反驳预测的想法/考虑
虽然poll表明80%的人赞成扩建railway作为减少highway拥堵的方案，但是就算这个方案成功施行了，highway拥堵也不会减少。
A：most people in favor of expanding the rail system reported less congestion during their highway commute as the primary benefit they would experience
大多数赞成扩建铁路的人把公路的拥堵分流当成他们的primary benefit；说明他们自己并不会去使用railway，就极端来说，方案即使实行也没人改变出行方式
在逻辑上比率只能是50%（50percent）而不能是一半，即，我们可以说：
the rate of mainstream American businesses failing is 50%.
但不能说：
the rate of mainstream American businesses failing is half.
The first is evidence that, in light of the evidence provided in the second, serves as grounds for the ecologist's rejection of a certain position.
第一个部分是基于第二个证据基础上的证据，作用是去支持Ecologists对于argument的反驳。
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For instance, in this sentence, change "buy(ing) on credit" to "buy(ing) expensive items on credit or borrow(ing) substantial sums of money".With a phrase that long, choice B, while still technically correct, will become completely unreadable. With its agreement problem fixed, choice C will still work well.