What Happens to the Marginal Product of Additional Cooks in a Restaurant

What happens to the marginal product of additional cooks in a restaurant kitchen as more cooks are hired?

A) Marginal product will stay constant.
B) Marginal product will rise continuously because each additional cook contributes something to the production process.
C) We cannot know because marginal product depends entirely on the skills of the individual cooks.
D) Marginal product will eventually fall because the cooks will start to get in each other's way and reduce each other's ability to produce.