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

When assessing the radial pulse of a patient,the nurse should 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.