Critical Reasoning

Auto industry executive: Statistics show that cars that were built smaller after 1977 to make them more fuel-efficient had a higher incidence of accident-related fatalities than did their earlier larger counterparts. For this reason we oppose recent guidelines that would require us to produce cars with higher fuel efficiency.
Which of the following, if true, would constitute the strongest objection to the executives argument?

A. Even after 1977, large automobiles were frequently involved in accidents that caused death or serious injury.

B. Although fatalities in accidents involving small cars have increased since 1977, the number of accidents has decreased.

C. New computerized fuel systems can enable large cars to meet fuel efficiency standards established by the recent guidelines.

D. Modern technology can make small cars more fuel-efficient today than at any other time in their production history.

E. Fuel efficiency in models of large cars rose immediately after 1977 but has been declining ever since.

i dont understand why the answer is C since C just cares of large cars while the question here is just about smaller cars.
Argument is that they cant produce small cars because it is making more accidents causing death and we have to opposit that argument. i dont understand, can you please explain

the argument builds the link between a fuel efficiency and size of cars as the required necessity. Then argument opposes the fuel efficiency guidelines based on the fatality rates of big cars vs. small cars; the argument tries to reinstate the big cars and discontinue the fuel efficiency for the reason of fatality. The argument mistakenly considers a car size as the only CAUSE for achieving the fuel efficiency EFFECT. Answer C suggests an alternative CAUSE to achieve the same EFFECT - computerized fuel efficiency system.

The stimulus says that small cars had more fatalities and concludes that we shouldn't produce more fuel efficient cars. The assumption is that the only way to make cars more fuel efficient is to make them smaller. C tells us we can, in fact, make cars more fuel efficient without making them smaller, thereby killing the argument.