Which of the Following Statements About Probable Cause Is Correct

Which of the following statements about probable cause is correct?

A) Once probable cause has been established, an arrest must be made.
B) Probable cause has been established, now proof beyond a reasonable doubt must be affirmed before an arrest is made.
C) The fact that probable cause exists does not require an arrest be made at that moment.
D) Absent probable cause, an arrest warrant must be obtained prior to making an arrest.