The correct answer is D. All of the above.
The running cost of a power plant is the cost of keeping the plant running on a day-to-day basis. It includes the cost of wages for the plant’s employees, the cost of fuel to power the plant, and the cost of lubricants to keep the plant’s equipment running smoothly.
The cost of wages is the largest component of the running cost of a power plant. The plant’s employees must be paid to operate the plant and to maintain its equipment. The cost of fuel is the second largest component of the running cost of a power plant. The plant must be fueled to generate electricity. The cost of lubricants is a relatively small component of the running cost of a power plant. However, it is still a significant cost that must be considered.
The running cost of a power plant is a significant expense for the plant’s owner. The owner must carefully manage the running cost of the plant to ensure that it is profitable.