—What happened? I called you several times yesterday evening, but I couldn't get through.

—Sorry, my sister and I ________ on the phone all the time.

A．talked

B．have talked

C．were talking

D．have been talking

根据《生产经营单位安全培训规定》（安监总局令第80号）第二十八条，安全生产监管监察部门检查中发现安全生产教育和培训责任落实不到位、有关从业人员未经培训合格的，应当视为（），责令生产经营单位立即停止违法行为，限期整改，并依法予以处罚。

A.生产安全事故隐患

B.安全生产隐患

C.生产安全事故

D.安全生产责任未落实