Aviation and Airport Security Practice Test.

The color code 'Green' indicates minimal threat in the CAPS-II system. The other options, Severe, High and moderate threats, would be indicated by yellow, orange, and red respectively. Green is commonly associated with being a "safe" or low threat color, as seen in the traffic light system. This is likely the reason why some may be tempted to choose another option. However, in this specific context of the CAPS-II system, Green indicates minimal threat.