Which of the following could help detect trespassers in a secure facility? (Select TWO)

Faraday cages are enclosures that block electromagnetic signals and are used to prevent electronic eavesdropping or interference, not to detect physical intruders.

Motion-detection sensors actively monitor areas for movement and can trigger alarms or alerts when unauthorized individuals enter restricted zones, making them a direct trespasser detection tool.

Tall chain-link fencing is a deterrent and physical barrier that may delay or discourage unauthorized entry, but it does not actively detect or alert personnel to trespassers.

Security guards actively patrol, observe, and respond to suspicious activity in real time, making them one of the most effective human-based controls for detecting and confronting trespassers on-site.

Smart cards are an authentication and access control mechanism used to grant or restrict entry, but they do not detect individuals who bypass card readers or enter through other means.