Even though a particular digital watermark is difficult to detect, which of the following represents a way it might still be inadvertently removed?

Even though a particular digital watermark is difficult to detect, which of the following represents a way it might still be inadvertently removed?
A . Truncating parts of the data
B . Applying Access Control Lists (ACL) to the data
C . Appending non-watermarked data to watermarked data
D . Storing the data in a database

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Answer: A