The law of diminishing returns indicates that

A. as extra units of a variable resource are added to a fixed resource, marginal product will decline beyond some point.

B. because of economies and diseconomies of scale, a competitive firm's long-run average total cost curve will be U-shaped.

C. the demand for goods produced by purely competitive industries is downsloping.

D. beyond some point, the extra utility derived from additional units of a product will yield the consumer smaller and smaller extra amounts of satisfaction.

*ANSWER: A. as extra units of a variable resource are added to a fixed resource, marginal product will decline beyond some point.*