Typically, Anti-Terrorist Target Hardening Strategies Involve a Number of Repeated

Typically, anti-terrorist target hardening strategies involve a number of repeated themes. Prominent among them is the control of traffic flows and parking to restrict the access of vehicle-borne bombs (´hostile vehicle mitigation´) involving what?

A) Strategically sited (reinforced) plant pots, signs or street furniture designed to withstand high-speed collisions
B) Buildings in high-risk areas are often constructed with shatter-proof glass
C) Armed patrol vehicles
D) High-risk areas often have very few places where packages could be concealed: litter bins are removed and manhole covers welded shut
E) Access points to particular areas or even entire neighbourhoods may be restricted