H12-821-v1-95-前缀列表的命令格式为ip ip-prefix ip-prefix-name [ index index-number ] { permit| deny } ipv4-address mask -length [greater-equal greater-equal-value ] [ less-equal less equal-value ],如果仅指定了greater- equal未指定less- equal,则前缀范围属于以下哪-项?（单选）

前缀列表的命令格式为ip ip-prefix ip-prefix-name [ index index-number ] { permit| deny } ipv4-address mask -length [greater-equal greater-equal-value ] [ less-equal less equal-value ],如果仅指定了greater- equal未指定less- equal,则前缀范围属于以下哪-项?（单选）
A[mask-length, greater -equal -value] B[0, greater-equal -value] C无限制
D[greater-equal -value, 32]

参考答案：D