To perform an accurate assessment of heart rate, the examiner can do which of the following? Select all that apply
A. Count the radial pulse for 30 seconds, if the pulse is regular, and multiply by two.
B. If irregular, auscultate the heart and count beats for 1 minute.
C. Count the radial pulse for 2 full minutes if the pulse is irregular.
D. Count the radial pulse for 15 seconds, if the pulse is regular, and multiple by 4.