prep106 看了以前的讨论帖仍然不理解的地方

flywer

106. (30167-!-item-!-188;#058&004112)

Officials at the United States Mint believe that the Sacagawea dollar coin will be used more as a

substitute for four quarters rather than for the dollar bill because its weight, only 8.1 grams, is far

less than four quarters, which weigh 5.67 grams each.

(A) more as a substitute for four quarters rather than for the dollar bill because its weight, only 8.1

grams, is far less than

(B) more as a substitute for four quarters than the dollar bill because it weighs only 8.1 grams, far

lighter than

(C) as a substitute for four quarters more than for the dollar bill because it weighs only 8.1 grams,

far less than

(D) as a substitute for four quarters more than the dollar bill because its weight of only 8.1 grams is

far lighter than it is for

(E) as a substitute more for four quarters rather than for the dollar bill because its weight, only 8.1

grams, is far less than it is for

正确答案是C

1、答案解释说B有歧义，请问这个歧义应该怎么理解？
2、用lighter跟less修饰weight都是可以的吗？
3、正确选项C应该怎么翻译，看来看去都不知道到底是什么跟什么在比较替代了，特别是那个the dollar bill是个什么东西？

谢谢大家的帮忙