单项选择题

GSM语音质量的指标算法是()

A.RxQuality质量0-2级采样点/RxQuality质量总采样点*100%
B.RxQuality质量0-3级采样点/RxQuality质量总采样点*100%
C.RxQuality质量0-4级采样点/RxQuality质量总采样点*100%
D.RxQuality质量0-1级采样点/RxQuality质量总采样点*100%