What is the disadvantage of the mineing industries in southren and northren africa

How did the united states surprise other delegates at the washington naval conference in 1921

What do you think was a drawback to this method of calculating distance

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.