What does a sound scientific conclusion most likely rely upon?

c. Evidence that is independently verified through a systematic process.

Explanation:

A scientific conclusion is the description or statement which is generated after analysing the outcome of the experimental procedure which is a part of scientific methodology. The scientific methodology is a step by step systematic appraoch to conduct research. The results or evidences obtain after implementation of methodology will be a reliable and acceptable.

Other scientists may verify the results and evidences by following the same systematic approach independently.

i believe it would be c: tons.

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.