Best Practices Include Which of the Following

Best practices include which of the following?

A) Take preanesthetic vital signs to provide a standard of comparison in the event of an emergency.
B) Take preanesthetic blood pressure readings to provide baseline information.
C) Take preanesthetic blood pressure readings to determine whether to use a local anesthetic with a vasoconstrictor.
D) Take preanesthetic vital signs to identify diagnosed or undiagnosed conditions.
E) All options listed