Answer the following question given this paragraph: 

Brain and spinal cord injuries most commonly occur because of car crashes or athletic activities. Fortunately, many injuries can be prevented by wearing seat belts and safety helmets (see Figure below ). Avoiding unnecessary risks, such as doing stunts on a bike or diving into shallow water, can also reduce the chances of brain and spinal cord injuries.


Q: What are the two most common common ways that brain and spinal cord injuries occur?


A:
car crashes and athletic activities