Ray Tends to Eat More at a Potluck Dinner,where There

Multiple Choice

Ray tends to eat more at a potluck dinner,where there are many options and different types of food,as compared to when he cooks dinner for himself at home.Given this information,
One reason why Ray might eat more at a potluck is due to

A) cultural influences.
B) classical conditioning.
C) the presence of a variety of flavors.
D) leptin.