The correct answer is
<span>The wealthy often profit from the hard work of the lower class.
The idea is that the lower class works hard while the rich ones reap what the lower class earns. The rich get richer while the poor get poorer. This is a very Marxist way of thinking because Marx himself claimed this and claimed that the classes should be abolished.</span>
Serbia supplied the rebels with weapons so that they could kill the archduke. Austria-Hungary declared war on Serbia. Russia entered to defend Serbia because they both had large Slavic populations. Germany entered to defend Austria-Hungary. Alliances drew other countries in until it was a world war.
One sec i have to look back in my notes give me two min
