Which of the following costs is an example of operation and maintenance cost?

Operation and maintenance costs refer to the ongoing expenses associated with running and maintaining a system or facility after its initial deployment. In this context, the correct answer highlights the cost involved in running the air conditioning system. This is a recurring expense necessary for the day-to-day functioning of the facilities, ensuring that systems operate effectively in a suitable environment.

In contrast, the cost of developing bid specifications and the cost of transferring data to another system represent one-time or project-specific expenditures rather than ongoing operational costs. The first option pertains to the initial stages of project development, while the third option relates to transitioning between systems, which also falls outside the scope of regular operational expenses. Thus, while all choices involve costs associated with project and system management, only the cost of running the air conditioning system is classified as an operation and maintenance cost.