Which situation will likely give rise to diminishing marginal product of labor? a) nevaeh's kitchen undertakes a massive expansion, doubling both the size of its kitchen and number of cooks. b) hell's kitchen, which has enough counter space for three cooks per shift, decides to hire a fourth cook per shift. c) a landscaping firm replaces all of its self-propelled lawnmowers with push mowers. d) plasma television manufacturers are going out of business because of increased competition from lcd televisions.