Which Statement About Interval and Ratio Schedules Is False

Which statement about interval and ratio schedules is false?

A) The rate of responding on interval schedules has no effect on the rate of reinforcement.
B) The rate of responding on ratio schedules is generally higher and faster than on interval schedules.
C) The rate of responding is less variable on interval schedules than on ratio schedules.
D) The highest rates of responding generally occur on the variable interval or ratio schedules rather than on the fixed interval or ratio schedules.