What work ends with the phrase, "Workers of all countries, unite!"? A. The Communist Manifesto B. The Wealth of Nations C. The Condition of the Working Class in England D. The Declaration of the Rights of Man and the Citizen

It was the Communist Manifesto ...

In The Communist Manifesto, Karl Marx and Friedrich Engels laid foundation for the Communist ideology. They encouraged workers to take control of their own destiny instead of allowing the management to control workers like a class of slaves. At the end of the book, Marx and Engels called workers to rise up together with the rallying cry of "Workers of all countries, unite!" Therefore, the correct answer is A. The Communist Manifesto.