Access to interior areas and rooms is generally controlled by (mark all that apply) :

I believe the answer is: Other Employees; Lock and Key devices

Interrior areas and rooms usually require security measurement so only a select few of people had access to it.

The security measurement usually being done by giving the authorized person with locking devices such as keys or cards. In case when an authorized person lost their locking devices, they can ask other authorized employees to open the room for them.