建筑施工中要严格按规定使用安全“三宝”，即（）。

A. One means, whether satellite or terrestrial techniques
B. Two means, whether satellite or terrestrial techniques
C. Two separate and independent means, each using different radio communication services
D. Two means, such as MF DSC and HF DSC

A. 行政规范性文件
B. 部门规章
C. 行政法规
D. 地方性法规