How did the egyptians change their environment in the black land? a. egyptian gold mines left toxic chemicals in the soil of the black land. b. they built irrigation systems that allowed water to flow into the desert. c. they erected large stone monuments all across the black land. d. they dug ditches and built dams to store water and control floods.

the doctrine of nullification recommended that states living inside the union have the one-sided, inalienable ideal to void any law made by the national government that could be esteemed illegal.

the united states was shaped based on a general agreement among its individual states. hence, it is inferred that under the hypothesis of invalidation, since the states are the establishment of the union, they have the ability to referee and disprove unlawful laws.

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