Which Statement BEST Describes the Forgetting Function That Ebbinghaus Discovered

Multiple Choice

Which statement BEST describes the forgetting function that Ebbinghaus discovered?

A) Material is forgotten at a relatively constant rate once it has been learned.
B) Nothing is ever really forgotten.
C) Material is forgotten at a relatively slow rate at first, and then the rate of forgetting speeds up.
D) Material is forgotten relatively rapidly at first, and then the rate of forgetting slows down.