When determining the scope of an experiment you need to consider (select all that appy) A. which data you will collect in plot
b. the outcome you will investigate
c. what results to report
d. the factor that will vary​

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.

which

you're crazy : )