How should consultants meet these requirements?

Universal container provides services to multiple machines installed at customer sites. Each machine has different issues that need to be fixed. UC wants to track progress, different part used, and time spent on each machine when dispatching a technician

How should consultants meet these requirements?
A . Work order will have multiple service appointments. Each service appointment will be linked to the asset
B. Each account will have a service appointment that will represent the work to be done at customer site
C. Work order will have multiple work order line item each work order line item will be link to the asset and have a service appointment
D. Each asset will have a service appointment that will represent work order needed each machine

Answer: C