An abstract presented at this year’s American Academy of Pediatrics National Conference and Exhibition in Orlando revealed that only 11% of children over the age of 12 who were treated for a bike-related injury in Los Angeles County were wearing a helmet at the time of their accident. 57% of bicycle-related fatalities can be prevented by using a protective helmet. Over 135 deaths, 40,000 head injuries, and 20,000 scalp and face injuries suffered by children between ages 4 and 15 can be reduced through the use of bicycle helmets.
My answer is A. hope this helps:/