present participle after comma

[Manminder]

555. One noted economist has made a comparison of the Federal Reserve and an automobile as racing through a tunnel, bouncing first off one wall, then the other; the car may get where it is going, but people may be hurt in the process.
(A) made a comparison of the Federal Reserve and an automobile as racing through a tunnel, bouncing
(B) made a comparison between the Federal Reserve and an automobile racing through a tunnel, bouncing
(C) compared the Federal Reserve with an automobile as racing through a tunnel and which bounced
(D) compared the Federal Reserve to an automobile racing through a tunnel, bouncing
(E) compared the Federal Reserve with an automobile that races through a tunnel and it bounces

i feel the participle after comma modifies the word just before it. but this is question bouncing does not modify the word tunnel. can someone please explain when the words after comma modifies the words before it and when they dont.the ans is D

[amitk7771]

Answer is D because :

a) Compared... to .. is used to compare dissimilar things.
b) bouncing... etc. Is a adverbial phrase. Refer to mgmat SC page 68, where the phrase need not touch the verb.

[kiranlegend]

IMO D


I have a doubt here.. what does 'bouncing first off one wall' do in D? is it an adjectival phrase or noun phrase??.. i understood that bouncing and racing are parellel, both being gerunds.. the reason i ask this question is to complete parallelism there needs to be 'and' right. that is missing..

please clear my doubts.. thanks!