The hamburger originated in Germany
Not 100% sure but I'm pretty sure siam was one of the only ones to escape colonization. look at effects on neighbouring countries?
<span>http://teachingresources.atlas.illinois.edu/chinatrade/introduction04.html</span>
"B. The English Channel helped protect the island nation of Britain from invasion" would be the best option from the list, since this Channel was oftentimes very choppy with strong currents.
