<span>During an unrestricted submarine warfare, one of the German U-boats had sunk the British passenger ship ,the Lusitania, at great loss of life. Public outcry in the U.S. led to America declaring war on Germany.</span>
The answer is B, communism. This is easy to remember because Europe colonized Africa, and basically enslaved the native peoples. Europe is never associated with communism, so it would not make sense for them to be fighting it.
Due simply to the fact that it was their native land they were fighting on. Whereas the colonist they were fighting were new to the lands and not yet fully acclimated.
the answer is B) natural gas
