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[主观题]

所谓3G，即3rd Generation，中文含义就是指第三代数字通信。第三代与前两代的主要区别是在传输声音

和数据的速度上的提升，它能够处理图像、音乐、视频流等多种媒体形式，提供包括网页浏览、电话会议、电子商务等多种信息服务。 根据上述定义，下列属于3G的是()。

A．小张给女友发送了一条彩信

B．小曹的手机定制了短信天气预报业务

C．小郑在跨越新年时用手机给远在海外的妹妹打电话

D．小唐使用手机里的闹铃功能让自己早早起床

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