Select from options: Continue writing the next sentence.

How to tell if a person has a concussion
Determine if the victim has lost consciousness.
Not everyone who gets a concussion will lose consciousness, but some people do. This is the most obvious sign that someone has a concussion.

Choices:
1). If you suspect this, spend extra time assessing your partner's injuries and seeking medical treatment. Lack of consciousness indicates a person is incapacitated and may be unable to seek medical aid.;
2). A concussion means someone is likely unconscious, with the victim's mind shutting down, and breathing quickly but shallowly. People who are intoxicated or in a drug-induced coma may appear completely unconscious, unable to move, and unable to clearly or vividly describe what the victim is experiencing.;
3). The victim may attempt to get out of the car and fall over before trying to stand and is aware. If the victim is unresponsive, they may not be able to stand and may be unconscious for a while, if at all possible.;
4). If the person has blacked out after a blow to the head, seek emergency medical treatment. Watch for slurred or unclear speech.;
Answer:
4).