You Observe Scrub Jays Hiding Food and Notice That One

You observe scrub jays hiding food and notice that one particular individual only pretends to hide food. What kind of experiment could you perform to test whether this was random or in response to another signal?

A) Attempt to reproduce the behaviour in captivity by using bird models and a computer simulation.
B) Hypothesize a set of signals that could produce this behaviour and try to match the behaviours with the signals.
C) Observe more of these behaviours in the wild and try to determine if the behaviour is random.
D) All of the above would be excellent experiments.