Multiple Choice Identiz the choice that best completes the statement or answers the question. Figure 13-2 Output 90 80 70 60 50 40 30 20 1 0 l 2 3 4 5 6 7 8 Workers 1. Refer to Figure 13-2. As the number of workers increases, a. total output increases but at a decreasing rate. b. marginal product increases but at a decreasing rate. 0. marginal product increases at an increasing rate. (1. total output decreases