I believe the answer for the first one is b and for the second one c and for the third one F
Answer:
Be installed / the free-rider problem.
Explanation:
The free-rider problem is the definition to a market failure in which those who benefit from a certain resource (in this case the security system) does not pay for said resource. In this case, given that the security system will cover the whole building, those (like Tom) that do not pay will continue to benefit from it regardless.
The answer is C. Slavery.
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