Which of the Following Is an Example of a Fixed-Interval

Multiple Choice

Which of the following is an example of a fixed-interval schedule?

A) In golf, you manage to sink a ball, on average, every 5 minutes.
B) In golf, you manage to sink a ball exactly every 2 minutes.
C) In golf, you manage to sink a ball, on average, every 4?? shot.
D) In golf, you manage to sink a ball exactly every 3?? shot.