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The IT department of a major law firm has noted that instances of malware being found on the firm’s computer systems have dropped significantly this year. The IT department attributes this decrease entirely to the employee digital safety guidelines it published earlier in the year, which made it less likely for the firm’s employees to accidentally download malware.

Which of the following, if true, would most seriously weaken the IT department’s explanation for the lower incidence of the malware being found on the firm’s computer systems?

A. Because of improved system diagnostic software, many system issues that until this year would have been identified as malware are now correctly identified as system issues.
B. The digital safety guidelines educated all employees about the risk of visiting suspicious websites on the internet.
C. Many new digital safety measures have been instituted by the law firm in the last two years.
D. Because of improvements to anti-virus software this year, malware infections can be resolved more easily.
E. The digital security standards of the law firm were brought up to the standards of its peers, seven years ago.

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