Workers cost $10.20 a worker, 20 workers produce 204 units of output, 21 workers produce 246 units of output, 22 workers produce 290 units of output. Explain what is happening to both marginal productivity of each additional worker and the marginal cost of each additional unit of output A) Marginal productivity and marginal cost are both increasing B) Marginal productivity is rising and marginal cost is declining C) Marginal productivity is falling and marginal cost is rising D) Marginal productivity and marginal cost are both declining E) None of the above