If a Rhythm Is IRREGULAR,the Best Way to Determine Rate

Multiple Choice

If a rhythm is IRREGULAR,the best way to determine rate is to:

A) count the number of QRS complexes in a 6-sec strip and multiply by 10.
B) count the number of large squares between two R waves and divide that into 300.
C) count the number of small squares between two R waves and divide that into 1500.
D) use a rate meter.