When using an ECG rhythm strip to quickly estimate the ventricular rate for a client, the nurse should:

A. Printing a 1-minute strip is time-consuming and not practical for quick estimation. B. The number of small squares between QRS complexes is used to calculate rate by dividing 1500 by that number (not dividing the number by 1500). C. The number of large squares between R-R intervals is used to calculate rate by dividing 300 by that number (not dividing the number by 300). D. Counting the number of QRS complexes in a 6-second strip (marked by 3-second intervals) and multiplying by 10 provides a quick and reliable estimate of ventricular rate.