A security manager performing a site survey using crime prevention through environmental design (CPTED) techniques...

Although CPTED focuses heavily on natural surveillance, incorporating mechanical or electronic means such as video cameras enhances visibility and monitoring. Surveillance deters criminal behavior and increases the chance of detection.

B (Brick wall) may obstruct visibility.

C (Planting trees) could obscure lines of sight.

D (Revolving doors) relate more to access control than CPTED surveillance goals.