Final answer:
Children below 8 years old may sustain significant injuries if they fall from a height greater than 10 feet.
Step-by-step explanation:
Falling from a certain distance can result in significant injury for children below 8 years old. The specific distance varies depending on factors such as the surface the child falls on and the position of their body upon impact. However, a common threshold for considering an injury mechanism to be significant is around 10 feet (D). If a child falls from a height greater than this distance, it is important to seek medical attention to assess and address any potential injuries.