It was announced that only when the fire was under control __________to return to their homes.

A．the residents would be permitted

B．had the residents been permitted

C．would the residents be permitted

D．the residents had been permitted

根据我国现行宪法，下列关于行政区划的表述，正确的是

A．海南省三沙市的设立由国务院批准

B．澳门特别行政区的设立由全国人大常委会批准

C．北京市东城区和崇文区的合并由北京市人大批准

D．河北省承德县甲山镇和大营子乡的合并由承德县人民政府批准