number of hours
number of products produced
number of workers
wages
Answer is Wrong!
Answer is Right!
The correct answer is A. number of hours.
Machine hour rate is the cost of running a machine for one hour. It is calculated by dividing the total running expenses of a machine during a particular period by the number of hours the machine was run during that period.
The other options are incorrect because they do not measure the amount of time that a machine is run. The number of products produced is a measure of the output of a machine, the number of workers is a measure of the labor input, and wages are a measure of the cost of labor.