Suppose That the Marginal Benefit of Having a Security Camera

Multiple Choice

Suppose that the marginal benefit of having a security camera in the library is given by MB,at the supermarket is given by MB₁ and at the museum is given by MB₂.All values are per week.
Marginal Cost is given as MC.Suppose the only variable cost of a security camera is the wage of the person monitoring it.Suppose further that camera monitors demand equal wages,regardless of their location.If wages for all camera monitors are set at $T,

A) all three locations will be served efficiently.
B) the museum will hire more monitors than the efficient number and the supermarket will hire fewer monitors than the efficient number.
C) only the supermarket will hire the efficient number of monitors.
D) the library will hire too many monitors.