In A , B and D "bouncing" after comma , gives us how aspect or the result of previous, illogically modifying economist
In C and E, i found logical mistakes in each of them.
C and which is not correct.
In E only error is "and it" starting of new clause with FANBOYS. Anyway it cannot modify any other noun except "automobile ", still manageable. Expert can comment better
Responding to a pm:
I do not understand what you mean by "In A , B and D "bouncing" after comma , gives us how aspect or the result of previous, illogically modifying economist
The use of "bouncing" is absolutely correct. It starts a participle modifier at the end of the sentence which modifies the entire preceding clause.
"bouncing first off..." shows the similarity between Fed and racing automobile. This similarity is highlighted in the preceding clause. The modifier explains the similarity. - perfect!
In (A) and (B), "made a comparison" is the problem. The use of the verb "compared" is far more suitable and precise.
In (E), joining "racing through the tunnel" and "bouncing off one wall..." with 'and' is illogical. They need to be independent ideas to be connected with "and". But "bouncing..." is showing how the automobile is "racing...".
So even if we remove the word "it" in (E), (D) makes more sense than (E).
(D) is correct in every aspect.
As for "compared to" and "compared with" - GMAT does not ask you to decide based on this distinction alone. As said in many of our posts, idioms are usually smokescreens.
But still, the correct distinction between them is this:
"compared to" is used to show similarity between things. The reason it often joins dissimilar things is that we NEED to show similarity when it is not apparent.
"compared with" is used to show differences. The reason it often joins similar things is that we NEED to show differences when things seem similar.
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