I received several compliments on the ______ of my skin. A: condition B: concentration C: concern D: concussion

Regarding the clinical manifestations of concussion, which of the<br/>following statements are correct?()<br/>A<br/>.Under normal circumstances, loss of consciousness does not exceed 30<br/>minutes <br/>B.<br/>No headache <br/>C<br/>.Elevated blood pressure <br/>D<br/>.Retrograde amnesia A: .Under normal circumstances, loss of consciousness does not exceed 30<br/>minutes <br/><br/>No headache B: .Elevated blood pressure C: .Retrograde amnesia D: No headache