Automation is best described as using technology to carry out repetitive, predictable, or routine activities with minimal human intervention, making C correct.

Automation does not require the elimination of humans. Instead, it is normally applied where defined activities can be executed reliably by technology, allowing analysts to devote more attention to complex, judgement-intensive, or customer-sensitive work. Examples in Service Desk environments include ticket routing, notifications, standard request fulfilment, monitoring responses, password-reset workflows, and repetitive administrative tasks.

Option A incorrectly equates automation with complete workforce replacement. Option B describes technology-assisted manual work rather than genuine automation because a person must still execute every step. Option D is also incorrect because transferring every decision to technology regardless of risk or complexity would eliminate necessary governance and human oversight.

SDA v9 explicitly includes AI and automation, requiring candidates to understand common examples, benefits, and challenges. These technologies are intended to reduce avoidable workload, increase efficiency, and improve consistency rather than indiscriminately eliminate human involvement. Therefore, C is the professionally correct definition.