【名词&注释】
一卡通(universal credit card)、精细化管理(fine management)、精细化控制(precise control)、落地式(floor plug type)、客服热线、系统接通率(system access successful rate)、有助于(helpful to)、不低于(no less than)
[单选题]10010客服热线系统接通率(system access successful rate)应不低于(no less than)()
A. 100%
B. 99%
C. 98%
D. 97%