The statements that show the effects of the Napoleonic Wars are B. the Napoleonic code controlled the European economy, C. Napoleon forced alliances on European nations and D. the French annexed the Netherlands and Belgium. The Napoleonic Wars were a series of wars between Napoleonic France and shifting alliances with other European powers that produced a French hegemony over most of Europe.
The best option from the list would be "b. the California Gold Rush of 1849 Eliminate" since this is the event that drew thousands of people to the west, thus occupying the US from coast to coast.
