If an activity generates a positive externality, the government can increase total economic surplus by the activity, and if an activity generates a negative externality, the government can increase total economic surplus by the activity.

answer: a. the kind of population living in your neighbourhood.

the census explorer data tool by the us census bureau allows the user to zoom in on any neighbourhood within the united states and find the kind of people residing in that by race and age.  

the tool needs to needs to be used twice – once in order to find what type of people reside in a neighbourhood, and then to see the age groups of the people in the same neighbourhood.

answer(d) the growth of consumption is likely to remain sluggish even as the economy begins to recover.;