Answer:
The definition is this; temporary unconsciousness caused by a blow to the head. The term is also used loosely of the aftereffects such as confusion or temporary incapacity.
and some symptoms are headache, ringing in the ears, nausea, vomitting, fatigue, and blurry vision
Explanation:
Number one is D and number two is B
The answer is C. using your head
B. more teens have unprotected sex when drinking alcohol
