What was european policy towards colonial trade to ensure

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.

Where did the first african american fighter pilots begin training?

You are traveling to japan and need japanese yen how much jpy could you get for $200