Time keeping refers to _______.

time spent by worker on their job
time spent by workers in the factory
time spent by workers without work
time spent by workers off their job

The correct answer is: A. time spent by worker on their job.

Time keeping is the process of recording the time that workers spend on their jobs. This information can be used to track productivity, calculate wages, and ensure that workers are not being over- or under-worked.

Option B is incorrect because it refers to time spent by workers in the factory, not on their jobs. Option C is incorrect because it refers to time spent by workers without work, not on their jobs. Option D is incorrect because it refers to time spent by workers off their jobs, not on their jobs.