When developing an experimental design, which action would imrove the quality of the results

c. live where it’s cold and icy

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.

because it travels in smaller waves then all other colors, causing it to be the most visible color