单选题Which of these terms refers to call issues that cause variations in timing or time of arrival？（）AqueuingBjitterCpacket lossDdigitized samplingEsignal-to-noise ratio ratio
单选题
Which of these terms refers to call issues that cause variations in timing or time of arrival？（）
A
queuing
B
jitter
C
packet loss
D
digitized sampling
E
signal-to-noise ratio ratio
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