Answer:
The correct answer is b. People.
Step-by-step explanation:
From Marxist criticism, the workforce is in many cases, the most, the only thing we have to sell, to survive. We all live in a capitalist production system where work has become a factor and cost of production. The object that results from our work never belongs to us, because it is what will make another rich, the least. On the other hand, Marx said that the salary will never be equivalent to the time we spend working: nothing can pay the time of a person's life.