Which of the following are true concerning Battle's sign?
A. Occurs with-in the first 30 minutes of trauma
B. Consists of bruising around the mastoid process and may indicate a middle fossa skull fracture or leakage of blood from a condylar fracture or trauma to the auditory canal
C. Consists of bilateral circumorbital ecchymoses, nasal epistaxis and CSF rhinorrhea and indicates a skull fracture in the anterior fossa.
D. Occurs from blast damage that causes rapid expansion of gas in internal hollow organs