Moss runs a functional analysis experiment as follows: For 20 minutes, she provides immediate social attention whenever Reeve makes a fist-to-face contact ("Reeve, don't hit yourself!"). Then for the next 20 minutes, she gives no attention, but remains on the other side of the room. She repeats this process and finds that Reeve tends to hit himself more during those 20 minute periods when she provides attention following his hits. Moss then repeats this experiment, but this time she has her assistant, Carrie, run the experiment. They get the same finding. This process most clearly represents which assumption of behavior analysis?

A) Parsimony
B) Determinism
C) Replication
D) Empiricism