Can someone please help me fill in this chart? For AP Economics.

Why is the continuous presence of police officers and vigilant members of the public an ineffective crime prevention strategy? *criminology*

Two technicians are discussing oil changes. technician a says that waste oil and old filters need to be disposed of according to the law. technician b says that old filters can be returned to the parts department for a core value. which technician is correct?           a. technician a only   b. both technicians a and b   c. technician b only   d. neither technician a nor b

How much hazardous chemical waste is produced per year in the us?