Real capital is supposed to earn a higher return where it is scarce. However, most international investment flows to the IACs (where capital is relatively abundant) rather than to the DVCs (where capital is very scarce). This is true because.

the return on investment is higher in IACs because of superior infrastructure and workforce.

Explanation:

Based on the information provided within the question it can be said that the return on investment is higher in IACs (which refers to Industrially Advanced Countries) because of superior infrastructure and workforce, that allow for higher production and overall quality. Unlike DVCs which are the opposite in this aspect.

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.