This is due at 11:59 please helpoo

Your answer is most likely D) ss.

Purebred means not bred with anything else, which would mean that the only genes available would be ss.

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.