​Economies of scale are also known as

A) ​Increasing returns to scale
B) Decreasing returns to scale
C) Constant returns to scale
D) ​None of the above

Economies of scale refer to the situation where an increase in production leads to a more than proportionate increase in output. This is also known as increasing returns to scale. Therefore, option A is the correct answer. Decreasing returns to scale refer to the situation where an increase in production leads to a less than proportionate increase in output, while constant returns to scale refer to the situation where an increase in production leads to a proportionate increase in output.