Joey offers floor cleaning services during summer. let Q equal the square metres of floor cleaned per day and let L equal the number of hours worked per day. Joey never works more than 12 hours per day and during that time his short-run production function is Q = L which of the following statements is FALSE?

A) Joeys marginal productivity diminishes for each additional hour worked.

B) Joeys average productivity is diminishing

C)Joeys marginal productivity is less than his average productivity

D) all of the above