You Observe a Chimpanzee Using a Stick to Dig Termites

You observe a chimpanzee using a stick to dig termites from a nest. How could you determine if this digging behavior is learned or innate?

A) Take the stick away and see if the chimp picks up another one.
B) Show the chimp termite mounds of different sizes and see which one he or she chooses for digging.
C) Provide the chimp with lots of different foods and see if he or she still digs for termites.
D) Raise chimps in isolation from other chimps and see if the chimps still exhibit the behavior.
E) Raise chimps in groups and see if the chimps still exhibit the behavior.