What geographic factors led to the decline of Sumer? Select all correct answers.

The Tigris and Euphrates rivers flooded every year, leaving behind dark, fertile soil.

Grain fields of one city-state bordered those of another, which caused territorial wars.

The cultivated soil had poor drainage.

It was located in a flat plain, and isolated from trade routes.

I think its Answer A and B (maybe also C)

Explanation:

im so sorry if its wrong

the correct answer is: (1) affected by gerrymandering; (2) not affected by gerrymandering.

gerrymandering is known as a practice that intends to establish a some kind of political advantage for a particular party or group. to do this district boundaries are manipulated. the new resulting district is named a gerrymandering.

in other words, what gerrymandering does is to draw the boundaries of electoral districts trying to benefit the party who is doing it. sometimes, the party controlling the legislature will redraw it so they can maximize the number of districts they are likely to control.