I think the answer is B or C but I could be wrong
Wave after wave of Germanic barbarian tribes swept through the Roman Empire. ... Romulus, the last of the Roman emperors in the west, was overthrown by the Germanic leader Odoacer, who became the first Barbarian to rule in Rome. The order that the Roman Empire had brought to western Europe for 1000 years was no more.
<span>Industrial production was booming in the early 1900's due to the technological advancements in the assembly line, making it easier for products to be made more efficiently.</span>
Government get its power from citizens voting.