When the total product starts falling, then the marginal product is
- increasing
- maximum
- zero
-
negative
The correct answer is: D
Explanation
The marginal product refers to the additional output produced when one additional unit of input is added while keeping other inputs constant. When the total product starts falling, it means that the additional units of input are contributing less to the overall output, resulting in a decrease in the total product.
Since the marginal product is the change in total product divided by the change in input, a decrease in total product means the change in total product is negative. Therefore, the marginal product is negative when the total product is falling.