Which of the Following BEST Conveys the Essence of Learning

Multiple Choice

Which of the following BEST conveys the essence of learning curves?

A) As the number of repetitions increases, time per unit increases.
B) As the number of repetitions decreases, time per unit increases.
C) As the number of repetitions increases, time per unit decreases.
D) As the number of repetitions increases, time per unit remains constant.
E) As the number of repetitions increases, time per unit doubles.