George Orwell use satire to achieve his purpose in this passage using "squealer's speech which mocks the obvious lies of political propaganda." (Option C)
Orwell has published a variety of works that have aided him in developing his purpose, which is to promote the word that power corrupts, and absolute power corrupts totally.
Satire refers to the use of humor, irony, exaggeration, or mockery to expose and condemn people's foolishness or vices, especially in the context of current politics and other hot topics.
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