Concept:Labour productivity measures output produced per worker or group of workers in a given time period.Explanation:The rate of output per worker is the amount of goods or services each worker produces per unit of time.It is also called average product.It is calculated using the formula:Labour productivity=Total number of labourTotal outputThis formula shows how efficiently workers convert inputs into output."Total output" and "individual output" do not describe the rate per worker over time."Workdone" is not the standard term used in production theory.Answer:A. Labour productivity.