Investment (and NO stock has a guaranteed return).
I would say A. Feel free to correct me if I’m wrong :)
Two nations that fought on the side of Russia and Serbia in WWII were France and Britain.
<h3>Which nations fought on the side of Russia and Serbia?</h3>
The French were allied to Russia so when war broke out and saw Russia and Serbia fighting against Germany and Austria-Hungary, France joined the Russians and Serbians.
Britain was allied with France and so joined the war on the side of the French.
Find out more on World War I at brainly.com/question/14345035.