Choose the answer that lists three barbarian tribes that threatened the roman empire in the fourth and fifth centuries a. d.

a.
visigoths, parthians, greeks

b.
burgundians, egyptians, franks

c.
iberians, ostrogoths, visigoths

d.
vandals, ostrogoths, huns

How did the completion of the transcontinental railroad change the lives of american citizens? a-it increased the wealth of all americans and enabled them to travel more.b-it made cross-country travel too expensive for ordinary americans.c-it decreased the safety of americans who moved to settle the plains.d-it shortened travel time between the east and west for all americans.

What stalled germany's initial invasion into france in 1914

Which of the following was probably the most difficult challenge facing construction of the railroad?