Which of the following isNOTconsistent with what we learned in the course?

a.Economies of scope occur when a number of different products can be produced more efficiently together than apart.

b.Decreasing returns to scale occur because of the law of diminishing returns.

c.Constant returns to scale denote a case where a change in all inputs leads to a proportional change in output.

d.Increasing returns to scale are also called economies of scale.