You are responsible for security at a building that has a lot of traffic. There are even a significant number of non-employees coming in and out of the building. You are concerned about being able to find out who is in the building at a particular time. What is the simplest way to accomplish this?
to find out who is in the building at a given time.
Answer option B is incorrect. To begin with this solution would entail significant costs. Furthermore, it would be difficult to implement for non-
employees entering the building.
Answer option D is incorrect. This might work well, but would not be the simplest way to accomplish the goal. It also would be moderately
expensive.
Answer option C is incorrect. This would be neither simple, nor cost effective. And it would be difficult to coordinate with the non employees
entering the building.
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