Which of the following characteristics relate to rate of return? Question 6 options: a) When the average cost of producing each individual unit declines as total output increases. b) Dividing the work required to produce a good or service into tasks performed by different workers. c) The market in which those who save money provide financial capital and receive a rate of return from those who wish to raise money and pay a rate of return. d) The payment in addition to the original investment from those who have received financial capital to those who provided it