Universal Containers has a requirement that during the first month of working, junior Service Resources...

Service Crews are the Field Service feature designed for situations in which two or more resources must work together on the same Service Appointment, with one assignment representing the whole crew.

Option A is correct. Modeling the senior and junior as members of a Crew, and assigning the Service Appointment to the Service Crew Resource, ensures they show up together for the same job and the same time slot. The crew composition can be updated as the junior gains experience.

Option B is incorrect because two separate Service Appointments do not guarantee that both resources arrive at the same time on the same site, and they double-count the work for reporting.

Options C and D are incorrect because Multi Stage Work is intended for sequential or simultaneous jobs that produce different outputs — not for two resources performing the same activity together. Crews are the supported pattern for joint-execution work.