During the Middle Ages, scholars preserved and built on the knowledge of the ancient Greeks. During the Renaissance, interest in was revived, changing the way people thought about the world around them. The is an example of the improving technology that made exploration of the world possible.

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.