Using the data in the above table, if the firm employs 3 workers, total product (measured in units per day) and average product and marginal product of the third worker (measured in units per worker) are
A) 19, 6 1/3, and 9 respectively.
B) 3, 19, and 6 1/3 respectively.
C) 19, 3, and 9 respectively.
D) 19, 6 1/3, and 7 respectively.