Refertotheexhibit.Whichoptioncorrectlydescribestheorderofsignalingandcall processingeventswhenabranchemployeecallsheadquarters？（）
<img src='https://img2.soutiyun.com/ask/uploadfile/2019-03-27/c87094e343d504cbe54e855bace6cc55.jpg' />
A.P，S，T，U
B.U，T，S，P
C.S，U，P，T
D.P，U，S，T
E.S，P，U，T
F.S，P，T，U
时间：2023-08-30 09:48:14
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