Answer:
C. randomly select people from all residents of the apartment building.
Explanation:
A. randomly select residents of the apartment building who have children.
If you only ask people who have kid(s), they will say yes because they want something to ocupy their kid(s) while they do something else.
This answer is incorrect.
B. randomly select resident who previously lived in an apartment complex that had a pool.
They will want a pool because they previously had a pool and lost it.
This answer is incorrect.
C. randomly select people from all residents of the apartment building.
If you randomly select people from all residents of the apartment building, the desision won't be as one-sided, giving everybody a fair chance.
Unless there is blackmail involed. Then you are doomed.
This answer is correct.
D. randomly select people who live in the neighborhood around the apartment building.
If you ask people that don't live in the building, you will
1) Loose buisness by making the people that do live in the building angry that you didn't ask them. They will in turn tell friends about it and you will enventually run out of buissness.
2) Quite possibly get the oposite of what the owners of the rooms want, making them angry that you don't look out for their wants, concluding in result 1.
This answer is incorrect.
I hope I helped! :D