When the Seriousness of Craniocerebral Trauma Is Assessed, It Is

When the seriousness of craniocerebral trauma is assessed, it is important to remember that

A) heavy scalp bleeding indicates serious trauma.
B) open injuries are always more serious than closed injuries.
C) signs and symptoms may not occur until several days after the trauma.
D) trauma to the frontal lobe is more significant than to any other area.