A sensitive manufacturing facility has recently noticed an abnormal number of assembly-line robot failures. Upon intensive investigation, the facility discovers many of the SCADA controllers have been infected by a new strain of malware that uses a zero-day flaw in the operating system. Which of the following types of malicious actors is MOST likely behind this attack?
A. A nation-state.
B. A political hacktivist.
C. An insider threat.
D. A competitor.