Use the Following to Answer Question

question 178

Multiple Choice

Use the following to answer question:
-(Table: Security in a Residential Community) Use Table: Security in a Residential Community.Suppose that the residential community has 100 residents.The marginal cost of hiring the third security guard is _____,and the marginal social benefit is _____.

• A)$150;$200
• B)$450;$1,800
• C)$150;$600
• D)$450;$600