單項(xiàng)選擇題
Which of the following is the most costly countermeasure to reducing physical security risks?物理安全風(fēng)險(xiǎn)的防控措施中,下列哪一項(xiàng)成本最高?()
A .Procedural Controls流程控制
B. Electronic Systems電子系統(tǒng)
C .Security Guards安全守衛(wèi)
D .Hardware Devices硬件設(shè)備