select the correct statements. select one or more: a. if outcome a is pareto-superior to outcome b, this implies that no participant prefers b to a, while at least one participant prefers a to b. b. an outcome that makes some participants very rich and others extremely poor can never be pareto-efficient. c. when outcome a is achieved, the sum of the utility of all participants is higher than when outcome b is achieved. it follows that outcome a is pareto-superior to outcome b. d. if outcome a is pareto efficient, then every participant prefers a to any other possible outcome. e. an outcome may well be pareto efficient but at the same time very inequitable, and thus undesirable. f. outcome a is pareto-superior to outcome b. this means that a is overall better than b for society, although some people individually may prefer b.