Which of the Following Cases Exhibit Increasing Returns to Scale

Multiple Choice

Which of the following cases exhibit increasing returns to scale?

A) Output increases by 5 percent when inputs are increased by 6 percent.
B) Output increases by 6 percent when inputs are increased by 5 percent.
C) Output increases by 7 percent when inputs are increased by 7 percent.
D) Output declines by 2 percent when inputs are increased by 1 percent.