When Measuring the Radial Pulse of a Patient,the Nurse Should

When measuring the radial pulse of a patient,the nurse should count the pulse:

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