Why do you think scientist don't use actual humans to do experiments with?​

take the average person you meet

Explanation:

Using human tissue in medical research throws up several different challenges. In our third 2012 NC3Rs 3Rs Prize post, Professor Gareth Sanger from Queen Mary, University of London, discusses how tissue removed from the stomach and intestine can actually help overcome some of these challenges.

hi,

the answer is third world countries, take for instance china, they restricted each family with only one child,

hope this !

b is the correct answer