The Forgetting Function Is Based on a Well-Known Concept and Compelling

The forgetting function is based on a well-known concept and compelling research showing that things that are remembered, including ad messages,

A) can be remembered almost indefinitely.
B) are forgotten almost immediately and removed from short-term memory.
C) begin to fade from people's memories at certain mathematically calculated points.
D) are retained only if the individual wants to remember them.