【单选题】听力原文: More than 30, 000 drivers and front seat passengers are killed or seriously injured each year. At a speed of only 30 miles per hour it is the same as falling from a third floor window. Wearing a...
A.
Saves more than 15,000 lives each year.
B.
Reduces road accidents by more than half.
C.
Reduces the death rate in traffic accidents.
D.
Saves lives while driving at a speed up to 30 miles per hour.