Answer:
Where is the primary exit?
Step-by-step explanation:
The reader unfamiliar with the building will definitely ask of the primary exit.
This is true because in an excavation plan, the first thing anybody will want to know is the primary exit especially one who is unfamiliar with the building.
This knowledge is very very necessary in order to help one whenever the need arises. This will help the individual unfamiliar with the building to escape whenever there is an emergency.