1. All elephants are grey All mice are grey Therefore, I conclude that all all elephants are mice The argument above is invalid because--

• A. the writer bases his argument on another argument that contains circular reasoning.
• B. the writer bases his argument on another argument that contains circular reasoning.
• C. the writer bases his argument on another argument that contains circular reasoning.
• D. the writer bases his argument on another argument that contains circular reasoning.

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