Andy will most likely approach his findings and paper using Zero population growth theory.
Answer: Option C
Step-by-step explanation:
The theory that Andy should refer to, for writing his theory about the infertility that has been affecting a lot of people in his family and his friends is the zero population growth theory. In this theory, there is a demographic balance condition in the region.
The population of that area neither grows nor declines where there is zero population growth going on. This might be taken as the social aim of the people of that area.