Which best describes Karl Marx’s viewpoint on capitalism and the emergence of Communism?

The government should not intervene in business and finance and should instead favor a laissez-faire policy.
The bourgeoisie will overthrow the proletariat due to inequalities resulting in a classless society.
The government should exist to support private business and the import and export of goods.
The proletariat will overthrow the bourgeoisie due to inequalities resulting in a classless society.