![](https://cos-cdn.shuashuati.com/pipixue-web/2020-1231-2005-12/ti_inject-812ce.png)
There is no requirement to have the restricted areas locked or secured
A.
All the restricted areas must be locked and secured
B.
No restricted areas should be locked and secured
C.
It is not required to have the restricted areas locked and secured
D.
There is requirement about keeping all restricted areas locked and secured