Which of the following physical controls can be used to both detect and deter? (Choose two.)

Lighting acts as both a deterrent and a detection aid. Brightly lit areas discourage unauthorized activity, making intruders more visible and less likely to attempt entry. It also improves the effectiveness of surveillance systems, allowing cameras to capture clearer images for detection. A sensor, such as a motion sensor or an infrared beam, is primarily a detection mechanism, alerting security personnel to a breach. However, visible sensors can also act as a deterrent, signaling that an area is monitored. Fencing, bollards, and locks are primarily deterrents, physically impeding access, but they do not actively detect. Signage is a deterrent, warning of security measures, but offers no detection capability.