Communism is based on the teachings of which man?

a) robert owen

b) keir hardie

c) karl marx

d) adam smith

i looked them all up and communism never popped up sooo yeah

C) Karl Marx. He is credited for finding Communism and he and Adam Smith were famous economists. Communism advocates class and owning of property and he is known for writing much about Communism and his Marxist theories, including in Economics. Adam Smith on the other hand had other economic ideas and was a Classical Economists and not a Marxist Economist, which is a key thing to know about these two economically and sometimes historically.

You're answer is going to be "C".
Karl Marx wrote several books, taught, and practices very early communist and socialist ideals.

I hope this helps! :)