Jordan Routinely Eats an Early Lunch Around 11:00 A

Jordan routinely eats an early lunch around 11:00 A.M. Even if there's no clock in sight, Jordan can tell when it's almost 11:00 A.M. because he feels hungry and wants to eat. Which of the following explanations accounts for this?

A) Just as set-point theory would predict, Jordan has established an 11 A.M. set point for eating.
B) Jordan has become classically conditioned so that the time of the day, 11 A.M., is a conditioned stimulus for him, triggering internal bodily changes that increase his desire to eat.
C) Negative energy balance and leptin resistance are occurring.
D) Positive energy balance and leptin resistance are occurring.