Over the last year, an organization's HR department has accessed data from its legal department on the last day of each

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Over the last year, an organization's HR department has accessed data from its legal department on the last day of each month to create a monthly activity report.
An engineer is analyzing suspicious activity alerted by a threat intelligence platform that an authorized user in the HR department has accessed legal data daily for the last week. The engineer pulled the network data from the legal department's shared folders and discovered above average-size data dumps. Which threat actor is implied from these artifacts?

A. privilege escalation
B. internal user errors
C. malicious insider
D. external exfiltration