Question: Data cleansing is to clear dirty data in a dataset. The dirty data refers to ? A . Data that contains contradictory and inconsistent records

Data cleansing is to clear dirty data in a dataset. The dirty data refers to ?
A. Data that contains contradictory and inconsistent records
B. Data that lacks some features or contains some missing values
C. Data that is stored in the devices affected by some pollutants
D. Data that contains incorrect records or exceptions

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