Read the following text and then choose the sentence that best reconstructs the main idea: 'The new company policy requires all employees to complete a mandatory cybersecurity training by the end of the month. The training is designed to help prevent data breaches and protect sensitive company information.'
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A
The company is offering an optional training on cybersecurity.
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B
Employees must complete a required cybersecurity training this month to prevent data breaches.
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C
A new policy about sensitive information will be released at the end of the month.
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D
Data breaches are a growing concern for the company's employees.