The answer is B.
Wegener could not explain how similar fossils could be found on different continents.
The assembly line was a manufacturing method that allowed much more efficient mass production of goods. This was pioneered by Henry Ford in 1913.
I'd say something like cultural diffusion, because if he traveled to different places, so might of his customs and clothes. I'm not sure what else though.
Answer:
This power put Napoleon in a position of great authority and enabled him to bring about wide-reaching social, economic, and political changes.