His argument was weak because it was based on a ______ assumption.

Answer and explanation

Correct answer: B. false

  1. Step 1: 'False assumption' is the standard collocation.
Answer
false.
Why not the others: "forged" is wrong because 'forged' describes documents or signatures. "fake" is wrong because 'fake' describes a counterfeit object and is not used for assumptions. "artificial" is wrong because 'artificial' describes man-made things, not mistaken beliefs.

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