The water in mesopotamian canals and irrigation ditches was controlled by a. farmers b. regulators c. tax collectors d. regional governors

B. Regulators

Explanation:

In Mesopotamia, the climate was dry and that made farmers dependent on the two major rivers Tigris and Euphrates. Sometimes these rivers would flood and the flood would change the course of a river which was a lot of trouble for the farmers. One of the ways they controlled this was with the development of a system that could control the flow and direction of water from the river. While canals and irrigation ditches were built for directing the water regulators were used to raise or lower the water levels in the canals so the water could be used by the farmers.

B.  regulators

Explanation:

. political or economical policy that isolates a country from participating in international relationships. it has been suggested that the united states participates in isolationism because of its lack of involvement in particular wars or alliances.