2) What is NOT a physical security measure for your home? (Antiterrorism Scenario Training, Page 2)
a.Hiding a key outside to ensure family members can get in if they lose their keys.
b.Monitoring Internet acquaintances of all family members.
c.Confirming that a cleaning company is reliable and licensed.
d.Changing locks to ensure key control.
e.Having good relations with neighbors and looking out for each other.