Final answer:
When more strawberry pickers are hired on a California strawberry farm, the marginal product of each additional pickers will eventually fall due to the Law of Diminishing Marginal Returns.
Step-by-step explanation:
As more and more strawberry pickers are hired by Charles Sumner to pick strawberries, the marginal product of strawberry pickers must eventually fall.
This is representative of the Law of Diminishing Marginal Returns, which suggests that as additional units of a variable factor of production, like labor, are added to a fixed factor, such as land, the additional output created by each additional unit of labor will at some point decrease. This happens because as the number of workers increases, each additional worker has less land to work on and less equipment to use, so their productivity adds less to the total output.