Question

who was eugene v. debs?
the author of the communist manifesto
an opponent of the pullman strike
a marxist writer and revolutionary
an american socialist who ran for president

Explanation:

Eugene V. Debs was a prominent American Socialist who ran for president multiple times. He was a key figure in the labor - movement and a socialist political leader. The Communist Manifesto was written by Marx and Engels. He was a leader of the Pullman strike, not an opponent. While he was influenced by socialist ideas, he was not primarily known as a Marxist writer in the same sense as some others.

Answer:

an American Socialist who ran for president