Which of the following is a good example of behavior modification for changing snacking behavior?
a. when i want a snack, i'll take a 20-minute walk, then reevaluate whether or not i still want it.
b. when i want a snack, i'll take only half of what i really wanted.
(c.) i won't purchase any extra food.
d. i won't eat dessert so i can have snacks throughout the day.