What four countries did American farmers compete with? How did that impact grain prices?

Increases in supply reduces the prices.

Explanation:

China, Canada , Russia and France are the four countries which produces higher amount of grains in the world and the American farmers compete with these countries. This competition reduces the prices of grains in the market because the supply of grains are more than the demand and every country wants to sale its grains so they reduces the prices which attracts other countries.

d

explanation:

i think that this is the best answer, but im sorry if this is wrong

answer; i believe the correct answer is (the willamete valley);