GMAT Sentence Correction (SC) | Re: New items developed for automobiles in the 1997 model year

THIS IS A GMATPREP QUESTION AND OA IS D.

New items developed for automobiles in the 1997 model year included a safer air bag , which, unlike previous air bags, eliminated the possibility
that a burst of smoke would appear when the bag inflated, and making an already terrified passenger think the car was on fire.

would appear and would make ( would understood) need to be parallel and this is happening in choice D only

A.inflated, and making - not parallel to appear
B.inflated, so that it could
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