Consider the following statistics:

"A total of 714 bicyclists are killed in crashes with motor vehicles in 2008. Bicyclist deaths were down 29 percent since 1975 but were up 14 percent since 2003. The decline since 1975 among female bicyclists (50 percent) was larger than the decline among male bicyclists (24 percent)."

"Ninety-one percent of bicyclists killed in 2008 reportedly weren't wearing helmets."

From among the choices below, which hypothesis is best supported by these statistics?

Select one:

a.Male recklessness causes bicycling deaths.

b.Females go slower and that causes a lower fatality rate.

c.Bad drivers cause fatalities among cyclists.

d.There are fewer bicyclists on the road in 2008.

e.A much larger percentage of bicyclists wear helmets in 2008 than in 1975.