the number of car were double
the total distance traveled by cars were doubled
the fatalities from traffic accidents increased by 300%

there must be a reason to justify the huge increased in traffic accidents fatalities.
for example we can say: those who bought new cars are responsible for these huge increase in traffic accidents fatalities.


Which of the following, if true, most helps to explain the disproportionate increase in traffic fatalities?

A. The average number of passengers per car was higher in the years before unification than it was in the two years after.
according to this option the number of fatalities must decrease!

B. After unification, many people who had been living in East Germany relocated to West Germany.
out of scope-relocation of people does not justify the reason behind disproportionate increase in traffic accidents fatalities

C. After unification, a smaller proportion of the cars being purchased by East German residents were used vehicles.
the type of car is irrelevant

D. Drivers who had driven little or not at all before 1989 accounted for much of the increase in the total distance traveled by cars.
the drivers who were unskilled in driving, are responsible for the much of the increase in total distance traveled by cars.
so, lack of skill in driving results in increase in accidents fatalities.

E. Over the same two-year period in East Germany, other road users, such as motorcyclists, bicyclists, and pedestrians, experienced only small increases in traffic fatalities.
this option indicates that the majority of the traffic fatalities are limited to car accidents, bit it does not give any reason for this occurrence.