12. The law of diminishing marginal returns says that: a. the less capital a firm is using in production, the smaller the boost in output it will get by adding one more unit of capital. b. the more capital a firm is using in production, the smaller the boost in output it will get by adding one more unit of capital. A profit-maximizing firm should seek to minimize the output it gets from each factor. a. and c. e. It's quite usual to work in a company like Dilbert's. eo