Price. I want to get the most amount of food for my money so I may be sacrificing quality.
Advertisements. If I see a particular celebrity whom I like drinking a certain drink, say a famous athlete is shown in an advertisement drinking this energy drink to improve his game, I will most likely purchase it so I can be more like him.
Convenience. If I’m in a hurry and need to eat something quickly I may choose fast food or a hot dog from a gas station versus taking the time to make a nutritious mea.
The answer would be social environment. Claire of course lost the weight because of her hard work but the encouragement from her friends definitely helped motivate her.
