Which of the Following Represent the Court's Opinion as to When

Which of the following represent the Court's opinion as to when exigent circumstances justify making an arrest without a warrant?

A) When the exigencies of the situation make the needs of law enforcement so compelling that that the warrantless search is objectively reasonable under the Fourth Amendment
B) When a delay in the course of the investigation would gravely endanger their lives or the lives of others
C) When speed is an essential element of police actions and acting without a warrant is imperative
D) All of the above
E) None of the above