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

Question

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

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The Answer of 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

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