What is an effective claim for this prompt?

Tension between the british and boers was caused primarily by what things?

What happened 10 million years ago? if u answer, u get 50 ! plz answer ; -;

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.