Answer:
a. machine hours
Step-by-step explanation:
Machine hours -
It is the measurement adapted to apply factory overhead to the manufactured goods , is referred to as machine hours .
In the field of machine environment ,
the time consumed for processing the machine is the maximum .
In case there is lesser machines in the company , the labor hours would be more .
Hence , from the given information of the question,
The correct option is a. machine hours .