Multiple choice questions, FOR BRAINLIEST!!

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.

What was one major cause of worldwide conflict during the first decade of the 21st century?

Causes and effects of the great depression