This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to identify symptoms of a head injury
Be aware of your risk.
Head trauma can happen to any person who bumps, bangs, or scratches his or her head. Injuries can happen as a result of car accidents, falls, collisions with other individuals, or simply bumping your head.

Choices:
[a]. Experiencing head trauma may also manifest as broken bones, detached head, or head injuries such as concussions. Depending on your age, these symptoms may affect your ability to undertake daily tasks like running or lifting a heavy load.;
[b]. Although most head trauma results in minor injuries and don't require hospitalization, it's still important to check yourself or any person after a mishap. This can help ensure that you don't have a serious or potentially life-threatening head injury.;
[c]. Injuries are generally sorted by region, race, age, or gender. It's important to realize that it's not always you, or anyone around you that needs to be evaluated, but your risk tolerance, physical impairment, or age.;
[d]. Head injuries are also known as trauma to the brain. Trauma to the brain is not considered a medical illness, and you should always be aware of your risk.;
The answer is:
[b].