It means that to insure safety upon students and faculty in the building, you must sign in with the front desk which is usually in the main office, drugs are not tolerated and weapons are not allowed. No one that either has an appointment or is a student or faculty member may enter the meeting or it would be seen as trespassing..
Since it says implied it would be D. assumed
Answer:
provided the information I am hoping I could be of some help. :)
Explanation:
