[单选题]58、 When deciding to rate limit the amount of traffic passing through your ASA 10/100 interface to 3Mb, but any out-of-profile traffic must be buffered and not dropped, which type of bandwidth management would you deploy?当决定将穿过ASA 10/100接口的流量限速为3Mbit/s时，而任何超出限速范围的流量必须被缓存起来而不是被丢弃，你应当配置哪种类型的带宽管理?
A. Shaping 整形
B. Policing 策略