ANS:D - all the above.

R.M.O. stands for "Running, Maintenance, and Operation." R.M.O. expenses include various costs associated with the operation and maintenance of assets, facilities, or equipment. Therefore, R.M.O. expenses typically include:

1. Running Expenses: These expenses cover the day-to-day operational costs incurred in running the facilities or equipment. Running expenses may include costs such as utilities, fuel, supplies, and other consumables necessary for regular operation.
2. Maintenance Expenses: Maintenance expenses encompass the costs associated with maintaining and repairing assets or equipment to ensure their continued functionality and longevity. This includes routine maintenance tasks, preventive maintenance activities, and repairs to address wear and tear or equipment failures.
3. Operation Expenses: Operation expenses refer to the overall costs of operating the facilities or equipment, which may include a combination of running and maintenance expenses, as well as other operational costs such as labor, supervision, administrative expenses, and overhead costs associated with managing and operating the assets.

Therefore, R.M.O. expenses include all the above components: running expenses, maintenance expenses, and operation expenses. These expenses are essential for ensuring the effective and efficient operation of assets, facilities, or equipment over their operational lifespan.