You Need to Have the Police in Your Department Practice

You need to have the police in your department practice some potential scenarios where they will need to rescue civilians in a shootout,but you do not want to create a large off-site simulation that requires a lot of manpower.You would really like to just have a couple officers work on it at a time.What can you use?

A) CMRC
B) FATS
C) CAD
D) HITS