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📝 **Question:** A 1 GB DataFrame has a `country` column with 50 unique values. What dtype shrinks it most? 📋 Pick the right answer. 💡 **Hint:** Re-read the theory above if unsure.

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📝 **Question:** A 1 GB DataFrame has a `country` column with 50 unique values. What dtype shrinks it most? 📋 Pick the right answer. 💡 **Hint:** Re-read the theory above if unsure.
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