The headmaster decided to have a word with whoever is ________ this matter.[ ]

A. responsible for  

B. in the charge of

C. operated  

D. connected for

瓦斯检查人员发现瓦斯浓度超过规定时，（）责令现场人员停止工作，撤出人员，并向矿调度室汇报。

A、无权

B、有权

C、请示上级