Final answer:
Without additional context, it's not possible to determine if the columns labeled 'Sales,' 'Date,' or 'Month' are mislabeled. More information about the content of these columns is required to make an accurate assessment.
Step-by-step explanation:
To accurately determine which columns are mislabeled, more context would be needed; however, as the question stands, we cannot determine that any of the column labels - A) Sales, B) Date, or C) Month - are incorrect without additional information about the data they are supposed to represent. For example, if the 'Date' column contains values that are not dates (like numeric sales data), then it would be mislabeled. Similarly, if the 'Month' column contains dates or specific days instead of the months, it too would be mislabeled. The 'Sales' column should contain numeric data reflecting sales figures; if it doesn't, then it would be considered mislabeled. If all columns contain the type of data that their titles suggest, none would be mislabeled, which would make option D) None of the above the correct choice.