How did John D. Rockefeller horizontally integrate his monopoly in 1880? A. He purchased iron mines around the country to add to his business.
B. He created a trust that controlled ninety percent of the nation's oil refineries.
C. He created a trust that controlled oil wells, refineries, and distribution networks.
D. He purchased coal plants around the country to add to his business.

Which statements correctly identify a condition that must exist for a culture to be considered a civilization

How are diamonds and graphite the same? how are they different? a. both diamonds and graphite are made entirely out of carbon. they are different because the carbon atoms are arranged differently with a more three-dimensional structure in diamonds and flat layers in graphite. b. both diamonds and graphite have atoms that are arranged with flat layers. they are different because only graphite are made entirely out of carbon. c. both diamonds and graphite have atoms that are arranged with three-dimensional structures. they are different because only diamonds are made entirely out of carbon. d. diamonds and graphite have no similarities. they are different because the carbon atoms are arranged differently with a more three-dimensional structure in diamonds and flat layers in graphite.

The national security act of 1947 reflected: