What was one way that European plans for partitioning in the Middle East after World War I led to conflict?

What would lead a historian to consider two events to have a relationship of correlation rather than causation

Which battle was one of the most devastating for

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