How many cases may a judge cite as precedent when formulating case decisions?

Civil liberties in latin america vary. this means that

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.

Which statement is the most accurately describes the reasons for the seven years war in north america