At the point where total product is ________, marginal product is zero, but average product is still positive.

A) maximized
B) minimized
C) zero
D) negative

When total product is maximized, it means that adding more units of the variable input (e.g., labor) does not increase the total output, which is why the marginal product (the change in total output from adding one more unit of input) is zero at this point. However, the average product (total output divided by the number of units of input) can still be positive, as there is still output being produced.