What is erythema

After applying the AED to a 56-year old female in cardiac arrest, you analyze her cardiac rhythm and receive a "shock advised" message. First responders, who arrived at the scene before you, tell you that the patient was without CPR for about 10 minutes. You should

A. perform 2 minutes of CPR and then defibrillate B. detach the AED and prepare for immediate transport C. deliver the shock as indicated followed immediately by CPR. D. notify medical control and request permission to cease resuscitation.

Draw the distinction between the nominal and operational definitions of a concept being studied. What are their respective roles in research?

What will be an ideal response?