Re: The development of hydrogen-powered cars will always be (i)________ by
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11 Dec 2022, 04:00
OE
The trigger while introduces two conflicting aspects of hydrogen-powered cars. The first clue states that hydrogen contains more energy per gallon than does gasoline, which would seemingly aid the development of hydrogen-powered cars; since the trigger changes the direction of the sentence, however, a word that means made more difficult would make sense in the first blank. Of the choices, only hindered fits. Both the semicolon and the thus tell you that the second blank agrees with the first, so you need a word that means something like difficult or awkward. Of the choices, only ungainly makes sense.