Average real wages have not risen significantly since approximately 1973

Average total cost minus average variable cost ________ as output increases because ________ as output increases

A) decreases and then increases; marginal cost initially decreases and then increases B) decreases; average fixed cost decreases C) decreases; marginal returns diminish D) decreases; economies of scale are present

Which of the following is an example of a land-intensive commodity?

A. Chemicals. B. Autos. C. Watches. D. Wool.