--- _____ the change of the schedule ______?

--- Oh, God! I forgot all about it. I’ll do it right now.

A．Has, been announced

B．Was, announced

C．Has, announced

D．Had, been announced

安全阀的总排气量必须大于锅炉最大连续蒸发量，并且在锅炉和过热器所有安全阀开启后，汽包内蒸汽压力不得超过设计压力的（）倍。

A.1.02

B.1.05

C.1.10

D.1.25