Which Technique Is Correct When the Nurse Is Assessing the Radial

Which technique is correct when the nurse is assessing the radial pulse of a patient? Count the:

A) pulse for 1 minute if the rhythm is irregular.
B) pulse for 15 seconds and multiply by four, if the rhythm is regular.
C) initial pulse for a full 2 minutes to detect any variation in amplitude.
D) pulse for 10 seconds and multiply by six, if the patient has no history of cardiac abnormalities.