According to socialist criticism capitalist profit arose from what?

From the relation between workers' labour and low payment

The governing concept is the socialist criticism of capitalist exploitation. Socialists argued that workers created value through their labour, but received only wages sufficient to maintain themselves, while owners retained the surplus as profit. In this interpretation, profit arose from the unequal relation between the labour performed and the payment received, not from a royal, feudal or religious practice. Option A expresses this connection accurately. Option B refers to political ritual, option C to inherited status, and option D to a social or religious principle; none explains the economic origin of capitalist profit in socialist analysis. The important reasoning is labour, wages, surplus and ownership.

This is a Class 9 History question. Chapter: Socialism in Europe and the Russian Revolution. Topic: The Age of Social Change.