One Group of Chimpanzees Slurp Termites Directly from a Stick

One group of chimpanzees slurp termites directly from a stick, another group picks them off the stick one by one. One group of chimpanzees breaks nuts with a stone hammer; another group does this with a wooden hammer. These group differences in food gathering practices best illustrate

A) algorithms.
B) intuitions.
C) heuristics.
D) cultural diversity.