![](https://cos-cdn.shuashuati.com/pipixue-wap/2020-1230-1107-56/ti_inject-812ce.png)
which is the proper sequence (顺序) to introduce an elderly, your boss,a junior colleague and a senior colleague to each other?
A.
an elderly--your boss-- senior colleague-- junior colleague
B.
your boss--an elderly-- senior colleague-- junior colleague
C.
your boss-- junior colleague--an elderly-- senior colleague
D.
an elderly--your boss-- junior colleague-- senior colleague