The Roman engineering achievement that made large public structures possible was

A)
the development of concrete.

B)
the development of organized labor.

C)
the development of measuring devices.

D)
the development of advanced math concepts.

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What are some effects outside of europe because of world war 1?

"the plan of removing the aboriginal people who yet remain within the settled portions of the united states . . approaches its consummation. . an extensive region . . has been assigned for their permanent residence. it has been divided into districts and allotted among them. many have already removed and others are preparing to go. . " removal of southern indians to indian territory, 1835 this passage is most closely related to a) imperialism. b) the civil war. c) westward expansion. d) the french indian war.

The national security act of 1947 reflected: