d. The lack of access to clean drinking water poses a serious health risk around the world, and funds must be raised to help achieve universal access.
Explanation:
many people around the world dont have access to clean drinking water. this poses an issue because children have to drink dirty water that contain diseases and germs that their bodies most likely arent strong enough to fight off.
In simple random sampling, every member of the population has the same chances of being selected. Every member is picked by chance.
A small random sample is one where a sample of subjects are used to study a bigger population. The chosen samples are to be used as a representation of a whole population which is the sampling frame.
A nation would most likely use military force to either portray power or for provoked reasons. You didn’t give the answer choices so I’m not sure how to help you.