Answer:
Howe's harvester
Explanation:
Threshing machine (or thresher), a machine that first divides the crest of a stock of seed from the hay, and then moreover separates the grain from the rest of the top.
Howe's thresher formed raw materials inexpensive for textile production.
If the graph shows unemployment rates in the United States in recent years, then the statement that most accurately would explain it, would be that, The United States suffered an economic downturn starting in 2009.
C is most likely going to be your answer.