Can service operation improve efficiency in the business operation by automating common routines?

This is incorrect because automation improves both efficiency - doing more with fewer resources - and effectiveness - achieving the right outcomes - not just effectiveness alone.

ITIL Service Operation explicitly recognizes that automating common routines reduces manual effort and increases operational efficiency by allowing the same or fewer resources to handle greater workloads. Introducing the Service Knowledge Management System (SKMS) complements this by enabling staff to access known solutions and workarounds faster. Together, these capabilities directly improve both the speed and capacity of service operation activities.

While partially true, this answer is incomplete because it omits the role of the Service Knowledge Management System, making option B the more thorough and accurate answer.

This is incorrect because automating common routines does far more than prevent problems - it actively reduces manual processing time and increases throughput, directly improving efficiency.