Erin, age 17 and her mother would like to lose weight. They join a weight management program that involves following a strict diet and daily exercise regimen. Both women initially find the program difficult but Erin finds that she is having a harder time resisting other enjoyable foods compared to her mother. Which of the following offers the best explanation for Erin's increased difficulty? O a. As a teenager, het frontal lobe is more active and prevents her from delaying gratification. b. As a teenager, it is harder for her to resist the immediate gratification that comes from eating an enjoyable food Oc. As a teenager, her metabolism is slower and causes her to have more intenso cravings for fat and sugar, Od. As a teenager, she is focused more on long-term goals and doesn't view short-term goals as important