If 15 Workers Produce 100 License Plates, 16 Workers Produce

If 15 workers produce 100 license plates, 16 workers produce 120 license plates, and 17 workers produce 130 license plates, then

A) diminishing marginal returns have not set in because the marginal product is positive
B) the marginal product of the seventeenth worker is 130
C) diminishing marginal returns must begin with the sixteenth worker
D) the marginal product of the sixteenth worker is greater than the marginal product of the seventeenth worker
E) the marginal product of the fifteenth worker must be 20