Cancer is all of the following except
a. capable of affecting different cells and tissues.
b. characterized by uncontrolled cell division.
c. capable of metastasizing.
d. a simple disease.
e. characterized by viable changes in cell characteristics.

step 1: replication fork formation.

step 2: primer binding.

step 3: elongation.

step 4: termination.

explanation:

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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.