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Explanation:
A) `drop_duplicates()`: This method is used to remove duplicate rows from a DataFrame based on a subset of columns or all columns. It returns a new DataFrame with duplicate rows removed.
B) `remove_duplicates()`: This method is not a valid pandas method for removing duplicate rows. There is no `remove_duplicates()` method in pandas.
C) `delete_duplicates()`: This method is not a valid pandas method for removing duplicate rows. There is no `delete_duplicates()` method in pandas.
D) `clean_duplicates()`: This method is not a valid pandas method for removing duplicate rows. There is no `clean_duplicates()` method in pandas.
Therefore, the correct answer is A) `drop_duplicates()`.
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