Which of the following controls would be most efficient to protect business data from corruption and errors?

Which of the following controls would be most efficient to protect business data from corruption and errors?
A . Controls to ensure data is unable to be accessed without authorization.
B. Controls to calculate batch totals to identify an error before approval.
C. Controls to encrypt the data so that corruption is likely ineffective.
D. Controls to quickly identify malicious intrusion attempts.

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Answer: B