Which emperor was responsible for extending the boundaries of the roman empire augustus (reigned 27 bce - 14 ce) trajan (reigned 98 - 117 ce) marcus aurelius (reigned 161 - 180 ce) constantine (reigned 306 - 337 ce)

Which of these innovations led to increased production in american factories in the early 1800s? a. the use of interchangeable parts b. the construction of canals c. the invention of the mechanical reaper d. the availability of electricity

Which economic sector employs the least number of people in mexico, barbados, and venezuela? a. agriculture b. services c. industry

How are the republican and democratic presidential candidates chosen? a. they are nominated by their state governments. b. each is nominated by his or her respective party. c. each is chosen by the governor of his or her home state. d. they are chosen by the house of representatives.