There was, as Squealer was never tired of explaining, endless work in the supervision and
organisation of the farm. Much of this work was of a kind that the other animals were too
ignorant to understand. For example, Squealer told them that the pigs had to expend enormous
labours every day upon mysterious things called 'files,' 'reports,' 'minutes,' and 'memoranda."
These were large sheets of paper which had to be closely covered with writing, and as soon as
they were so covered, they were burnt in the furnace. This was of the highest importance for
the welfare of the farm, Squealer said.

Which of Animal Farm's themes is illustrated in this excerpt?

A.) working-class loyalty
B.) social-class hierarchy
C.) corruption of power
D.) manipulation of language