How did construction of dams and canals in washington most benefit farms?

they ensured that droughts would never happen.
they stopped diseases from getting into crops.
they stored and carried water to the farms.
they generated power to run the farms.

The correct answers is:

-> They stored and carried water to the farms.

Dams in Washington would also generate power to hydroelectrics,  it would help on flood control, water supply, waste management, for example.

Dams and canals in Washington most benefited farms as they stored and carried water to the farms.

Option C

Explanation:

The widespread network of canals connected to a number of different dams in Washington greatly facilitated farming in the state. Unhindered supply of water helped the farmers in the region exercise convenience in applying cropping patterns and take more than two crops a year. The productivity of the farms increased owing to the availability of water all throughout the year.

answer; self-serving bias;