Which statements best explains one way that the structure of this excerpt is effective

During world war 2 mexican workers came to the united states as part of the

In ohio in 1872, the cleveland massacre was a violent labor dispute at standard oil refineries in cleveland. a takeover by standard oil of the refineries in cleveland. an attempt to stop standard oil from becoming a monopoly. a failed attempt by standard oil to take over other refineries.

Explain how stock market speculation contributed to the great depression.